Learn how to make Fermented Hot Sauce – a simple way to enhance and preserve your abundance of garden chilies to use throughout the winter.  Full of healthy probiotics, this easy recipe has many health benefits. Plus it just tastes good! Video.

A simple delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands on time! #hotsauce #fermentedhotsauce #chilisauce

For many of you with gardens out there, this is the season of harvesting. Here’s a simple way to use all those chilies you’ve got growing out back and turn them into something that will bring you a little kiss of sunshine during the cold months – Fermented Hot Sauce! Now, before you feel intimidated – know that this only takes 20 minutes of actual hands-on time and no special equipment. It’s ridiculously easy! 

Why I prefer fermenting over canning:

  • Healthier:  Fermentation creates “ALIVE” food- incredibly rich in probiotics. These good bacteria are living creatures that work with our microbiome to improve digestion, boost immunity, and prevent disease. Having a diverse microbiome is healthy! Canning “kills” all these healthy probiotics through the heating process.
  • Taste: I prefer fermentation over “canning” because fermentation keeps these healthy bacteria alive, and as a result, the fermented food actually tastes better and better with time! Canning halts the development of flavor.
  • It’s easier:  Canning requires more hands-on time.
layering the veggies and chilies in the mason jar.

How to make Fermented Hot Sauce:

Step one: Fill a clean 2-quart jar with any type of fresh hot chili, onions, garlic and thinly sliced carrot. You can use bell peppers to temper the hot chilis if you want a milder version. Just stick with the same color palette so your fermented hot sauce stays colorful and vibrant.

In this recipe, I used Padrone Peppers, a Spanish variety that had turned red, which I found at our farmer’s market. But feel free to use any kind you want or a blend. You’ll need about 1 pound in total. (You can easily halve this recipe)

Step two: Make a saltwater brine, using 1 1/4 teaspoons fine sea salt, per 1cup of water.

Salt Ratio for Fermentation: 

Having the right proportion of salt to water is important. Not enough salt may allow unhealthy bacteria to grow. Too much salt will kill all the bacteria and the chilies won’t ferment. If you need to add more water to the jar, then add salt accordingly.

Use 1 1/4 teaspoons fine sea salt per 1 cup of water. This is roughly a 3% Brine (3 grams of salt per 100g of water). 

Here, I used 5 cups of water, so I added 1 1/4  teaspoon salt x 5 cups water  = roughly  6 1/4 teaspoons of fine ground sea salt.  Heating the water slightly helps the salt dissolve.

making the salt brine.

Step Three: Combine! Pour the brine over the chilies and push them down so they are completely submerged under the brine. Feel free to cover the chilies with a cabbage leaf to keep everything down, then weigh them down.

Step Four: Weigh down the chilies. You can use a fermentation weight, like this version that I really like, that will fit perfectly into a mason jar, to keep everything submerged. If anything floats to the top, and touches air, this can potentially mold, so either fish it out with a slotted spoon, or push it down under the brine.

Or in a pinch, a zip lock bag filled with water can be used as a weight, just place this over top. I prefer using a glass or ceramic weight.

A simple delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands on time! #hotsauce #fermentedhotsauce #chilisauce

The water in the bag will work as the fermentation weight here. A small clean shot glass, placed over a cabbage leaf, can also act as a fermentation weight as well.

Here you can see I’m working on a mild green hot sauce which is in the fermenting phase still.

A simple delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands on time! #hotsauce #fermentedhotsauce #chilisauce

Step Five: Place a lid on top, leaving it loose. You want the fermentation gasses to be able to escape while keeping any creatures (bugs, flies) out. A couple of layers of cheesecloth also work here.

Step Six:  Place the jar in a bowl or pan to catch any liquid that may spill over, and place it in a cool, dark place, like a basement.  65F-70F is ideal. If you don’t have a basement or a cool place, a lower cupboard in the kitchen is an option.

Check every few days, removing any “floaters”. After a few days, the brine will turn slightly cloudy, and when you tap the jar, you should see little bubbles float to the surface or some overflow on the pan- all signs of life!

Ferment 5-10 days. I usually go 7-12 days, long enough to soften those carrots, which you will be blending up in the sauce.

If, for some reason, you are going out of town, you can always place the ferment in your fridge, which will slow it down, but keep it alive, and you can resume when you get back.

Why is the Brine Cloudy?

Cloudy, tangy brine is a natural by-product of the fermentation process- a combination of lactic acid and yeast- and is the reason why they call it Lacto-fermentation.

Various strains of bacteria are present on the surface of all plants, especially ones growing close to the ground.  Lactobacillus bacteria convert sugar into lactic acid, preserving the peppers.

Both salt and lactic acid prevent the growth of harmful bacteria. Over time, the cloudiness can settle out of the brine to the bottom of the jar. Some batches are naturally cloudier than others, but all are safe to consume.

A cloudy brine is a sign that you have a safe, successful, and tasty ferment.

A simple delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands on time! #hotsauce #fermentedhotsauce #chilisauce

Step 7: Blend!  Strain the brine, saving it. Add the strained chilies/carrots/garlic to the blender with one cup of brine and blend until smooth, a least a minute! At this point, you can add herbs (oregano or cilantro is nice here) and spices (cumin, coriander, chipotle).  Add a little splash of Braggs apple cider vinegar if you like (this is optional but also full of healthy bacteria) and more brine to desired consistency.

If you like the idea Sriracha, you could also make it sweet by adding sugar or honey, and perhaps ginger.  You could also add herbs.

A simple delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands on time! #hotsauce #fermentedhotsauce #chilisauce

Step 8:  Store! For everyday use, store the fermented hot sauce in squeeze bottles– leaving the tip off or open (or lightly closed) in the fridge. The hot sauce will continue to ferment in the fridge, and the open tip will allow the gasses out. Before using, cover the tip with your finger and give it a good shake.

A simple delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands on time! #hotsauce #fermentedhotsauce #chilisauce

A little Warning!

If you place the fermented hot sauce in tightly sealed bottles, unrefrigerated, they will  EXPLODE! This is because the hot sauce is still fermenting (producing gases) and will continue to create bubbles. Remember, it is alive, and this is NOT canning.

*If giving as a gift, yes, feel free to use a “cute bottle” but with instructions to refrigerate and loosen the lid.

But my hot sauce is way too hot!

Don’t be too alarmed if your hot sauce tastes overly hot when you first store it. After a week or two in the fridge, the gradual slow fermenting will substantially mellow out the heat! It’s quite surprising. Many times, I’ve made a hot sauce and tried it, thinking there was no way we would be able to eat it because of the heat level. But after a week or two, it really does calm down the heat. Fermenting the hot sauce gives it another layer of flavor, adding more and more complexity. This will keep indefinitely in the fridge.

Types of chilies to use:

Use any fresh chili pepper you like or a blend of different peppers (in the same color palate). To temper the heat, feel free to add similarly colored bell peppers (red, yellow, or green bell pepper). For example- add a golden bell pepper to habaneros to temper the heat. Or a green bellpeper to serano chilies.

Keep in mind you will be blending the sauce, so stick with the same color palate to make a vibrant-colored sauce. For example, mixing red and green peppers will yield a brown hot sauce- not the prettiest, but up to you. 😉

Also, keep in mind that fermentation will mellow out the heat of the peppers over time.

I am hearing that frozen peppers can be fermented ( please read the comments), but have not personally tried this.

Helpful tools

Making Fermented Hot sauce is a fun little project that only takes about 20 minutes of hands-on time. A lovely way to use up all the chilis in your garden (or a way to try out all the beautiful varieties at the farmers market) and a healthy way to bring more healthy probiotics into your life!

Mother Nature will do all the work for you! And after 5-7 days, you will end up with the most delicious, alive hot sauce that will get better and better with age!


  • If there are no signs of fermentation, double-check you measured the salt ratio correctly. This is typically the most common problem (adding too much salt will halt the process and kill all the bacteria, even the good ones.).
  • Try filtered water. Chlorinated water can halt fermentation.
  • Do not over-wash or peel the peppers/carrots (for example, don’t use any type of produce soap) as the wild bacteria from the pepper skin, carrot peeling is what is starting the fermentation. I have the best luck with farmers’ market chili peppers and carrots because they are not over-cleaned or treated with anything.
  • Mold: If your ferment has molded, something likely rose to the top of the jar and had contact with air. I would start over.
  • Bad smell: the brine should smell tangy, garlic, and fresh, not “foul” in any way! If it smells “off,” it could be that salt was mismeasured or the ferment was contaminated: dirty hands, dirty utensils, dirty jar.

More Favorite Ferments!

Watch HoW to make Fermented Hot Sauce!

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A simple delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands on time! #hotsauce #fermentedhotsauce #chilisauce

Fermented Hot Sauce

  • Author: Sylvia Fountaine | feasting at home
  • Prep Time: 20 minutes
  • Cook Time: 5 days
  • Total Time: 120 hours 20 minutes
  • Yield: 4 cups 1x
  • Category: Sauces, fermenting, preserving
  • Method: fermenting
  • Cuisine: American
  • Diet: Vegan


A simple, delicious recipe for Fermented Hot Sauce using fresh summer chilies, with no special equipment and only 20 minutes of hands-on time!


Units Scale

Saltwater Brine: ( 1 1/4 teaspoon salt per 1 cup of warm water) This is roughly a 3% Brine. (3 grams of salt per 100g of water) 

  • 5 cups filtered water
  • 6 1/4 teaspoons finely ground sea salt (or Pink Himalayan salt) – use 1 1/4 teaspoon salt, per 1 cup of water.
  • 2 Quart Mason Jar


  • 16 ounces fresh chili peppers, sliced in half (about 6-7 cups) seeds & stem removed, see notes
  • 1 carrot, very thinly sliced 1/16th-inch (do not peel!)
  • 48 garlic cloves, cut into quarters
  • 12 shallots, sliced (or 1/2 an onion)

After fermenting, add optional seasonings to taste. Keep in mind the “heat” will mellow with age.

  • optional: herbs (oregano, cilantro, celery leaves) and spices (cumin, coriander, chipotle powder, smoked paprika)
  • 13 tablespoons apple cider vinegar, (optional- for extra tang and for more healthy probiotics)
  • honey or sugar to taste (optional, good if making Sriracha style)
  • If your hot sauce is not hot enough, you can always add cayenne or ground chipotle to taste. Free free to add spices ( 1/2- 1 teaspoon) cumin, coriander, chipotle, allspice, etc. Make this your own.


  1. Wash your hands, jar and ustensils. Not sterilized, just clean. 🙂
  2. Stir sea salt into the water until dissolved.
  3. Slice the small hot peppers in half, and remove stems and seeds if you like (for less heat). If your pepper are very hot, wear gloves.  If adding bell peppers to temper the heat, cut into thin strips. Thinly slice the carrot (do not peel), slice the shallots, and slice the garlic.
  4. Layer all into a clean 2-quart mason jar.  Top with a cabbage leaf to hold things down (optional) and pour the brine into the jar over the chilies, pressing them down under the liquid. If you need to add more brine, remember to use the ratio of 1 1/4 teaspoon salt per 1 cup of water.
  5. Weigh everything down with a fermentation weight (or use a small ziplock bag filled with water to weigh the veggies down or try a clean shot glass). You want the chilies completely submerged under the brine. Anything that touches air, may mold, so either spoon it out or push it down. Cover loosely with a lid ( or cheesecloth and rubber band) and place the jar in a pan or bowl to collect any liquid that may bubble over. The lid is loose here so gasses can escape easily, but no creatures can get in.)
  6. Place in a cool dark place, like the basement,  65-70F is ideal, (or the bottom cupboard in the kitchen) for 5-10 days or until signs of fermentation.
  7. On day 3-5:  Check for fermentation: Tap the container and see if any tiny bubbles rise to the surface, check for a cloudy brine ( see notes) or check the bowl underneath, to see if there was any overflow. All signs of activity! Ferment 7-10 days, long enough to soften those carrots that you will be blending.   And you can always ferment longer for even more flavor- I’ll often ferment 12 -14 days. Sometimes I’ll ferment 7 days, then place the jar in the fridge for a few weeks before blending. The longer the ferment,  the tangier and more flavorful this will become, and the more mellow the heat. *If there are no signs of fermentation, give it a couple more days- then check the troubleshooting section in the post.
  8. After 7 days and signs of fermentation, strain and SAVE the brine. Place the fermented peppers, onions, garlic, and carrots into a blender and discard the cabbage leaf.  Add 1 cup of the brine and blend until smooth as possible. This may take a couple of minutes. Add the vinegar if using, (and honey if you prefer a sweeter hot sauce like Sriracha), and more brine to desired thickness. At this point, you can blend in optional spices and herbs. ( 1/2-1 teaspoon spices, 1-2 tablespoons fresh herbs).
  9. Don’t be alarmed if it is overly spicy- the heat level will significantly mellow with time, as it continues to ferment in the fridge after 1-2 weeks. Place in a squeeze bottle and store in the fridge, leaving the tip open (or loose) for gasses to escape.
  10. Do not place in a sealed jar unrefrigerated– this will result in an explosion– and a great big mess- as the hot sauce is still alive and fermenting! BE WARNED! I have the best luck with using in squeeze bottles and leaving the cap off in the fridge.
  11. If transporting to a friend as a gift, it is ok to seal for short periods of time (a few hours) but make sure to tell them to refrigerate it and loosen the lid, very soon after receiving.
  12. The flavors will continue to develop and get more complex over time, the heat mellowing.
  13. To use, cover the tip of the opening with your finger and give a shake before using.
  14. This will keep up to 12 months in the fridge (probably even longer!).


WATER: Regular tap water may contain too much chlorine in it, inhibiting the fermentation process (although our tap water works fine). If fermentation is not happening, you may want to try filtered water.

SALT: I use fine ground sea salt or Pink Himalayan salt . If using coarse ground salt you may need to add a pinch more.

Peppers: Use any chili pepper you like or a blend of different peppers (in the same color palate). To temper, the heat, feel free to add similar colored bell pepper -substitute sweet red, yellow, or green bell pepper. Keep in mind, you will be blending the sauce, so stick with the same color scheme to make a vibrant colored sauce. For example, mixing red and green peppers will result in a brown hot sauce– but up to you. 😉 Also, keep in mind, the fermentation will mellow the heat a little. Removing the seeds will help temper the heat.

RATIO: If you need more water to cover or fill the jar, use 1 1/4 teaspoon salt per cup of warm water.

You could easily halve this recipe or use two, quart-sized jars.

CLOUDY BRINE: A cloudy brine is a natural by-product of the fermentation process-a combination of lactic acid and yeast and is the reason why they call it Lacto-fermentation. It is a sign of fermentation. Various strains of bacteria are present on the surface of all plants, especially ones growing close to the ground. Lactobacillus bacteria convert sugar into lactic acid, preserving the peppers.Lactic acid prevents the growth of harmful bacteria. Over time the cloudiness can settle out of the brine to the bottom of the jar. Some batches are naturally cloudier than others, but all are safe to consume and taste delicious. A cloudy brine is a sign that you have a safe and successful ferment.

Signs of fermentation: liquid overflowing into the bowl (check the bowl to see if the jar overflowed, a good sign! Tiny bubbles rising to the top when you tap the jar. Cloudy brine, tangy flavor or smell.


  • Serving Size: 1 tablespoon
  • Calories: 4
  • Sugar: 0.4 g
  • Sodium: 112.3 mg
  • Fat: 0 g
  • Saturated Fat: 0 g
  • Carbohydrates: 0.9 g
  • Fiber: 0.2 g
  • Protein: 0.1 g
  • Cholesterol: 0 mg

Keywords: fermented hot sauce, fermented hot sauce recipe, how to make hot sauce, how to ferment hot sauce, hot sauce, hot sauce recipe, best hot sauce recipe

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  1. i sort of forgot and left mine fermenting for 12 days now. don’t see mold or anything scary, just cloudy. you think it’s fine?

    1. Hi Casandra! Yes, I do think it is fine! If it smells good, and no mold, it is probably great!

  2. Hello! Made your recipe. Let it sit for 15 days. Used the “hotties” jalapeños. Thank you for the inspiration ! Any use for the leftover Brine?

  3. This is my go to hot sauce every fall after picking all remaining peppers from garden. I make an all green pepper and an all red pepper sauce that’ll last me until the following summer when my new crop starts producing. A+ recipe

    1. You can close it- but I would burp it every so often. Because it is still fermenting it is creating gasses. If you are using it regularly then you are probably fine to leave the lid on.

  4. I’m going to try this with ghost peppers, carolina reapers and maybe some pineapple or mango in addition to the carrot and shallots/onions, to balance out the sweetness. I also think I’m going to ferment any additional herbs from the beginning, kind of like pickle brine, then blend with a mixture of the brine (for all of the water-soluble flavors) and some kind of liquor (to bring out the fat/alcohol soluble flavors). I’m thinking either mezcal or a good scotch to add some smokiness.

    1. Sounds tasty! I’ve never used alcohol- will it kill the bacteria here and stop the fermentation? I would research that if you dont know for sure. 🙂

    2. Fermentation naturally produces alcohol over time, enough to bring out the fat soluble flavors. Adding a little extra is fine, but too much will kill things. Keep the total alcohol concentration under 6-7% and you should be fine.

      Also, any alcohol will eventually be converted to acetic acid furthering the fermentation process. Eventually, any added alcohol will end in the very similar amounts of alcohol as fermenting naturally produces. In conclusion, adding a little liqueur is fine, but the only real noticeable difference will be the addition of the flavors of whatever liqueur you go with.

    1. Fresh is great. Add dried after it has fermented when blending ( they like to float to the top and then can get moldy if they touch air).

  5. Looks amazing. I really want to make this. I love Sambal Oelek but the company that makes it has a supply shortage so every store is out of stock.

    I wonder that type of chilies you use and where do you find them. I live in Oregon and have looked in many store. Such a strange shortage to have. I might need to start growing my own.

    1. The red ones are hard to find and get bought out very quickly! I usually find them at our farmers market- or try an Asian Market. If they are the hot Thai chilies you could sub half with red bell pepper to temper them!

  6. I have tried on a couple of occasions to make hot sauce replacing the water with Gewurtztraminer without success. What do you think about the prospects of doing so with your proportions of salt to the liquid?

    1. hey Mark, I actually have never thought of trying that. I am at a loss here-not really sure how that would turn out. Does alcohol kill the growing bacteria? Hummm… anyone else have an idea?

  7. I’ve been making your recipe a long time. I’m going to make some using peaches, do they need to be peeled.

    1. Hi Ernie! That is a great question. The skin is where the bacteria are for fermenting so on the one hand, I see not peeling them. But then they are quite fuzzy, which would probably blend in Ok, but I am not positive. I think you could go either way.

          1. I used peaches that weren’t peeled along with ghost and reaper peppers. Turned out very good.

  8. once blended and in the fridge, does it need to remain uncapped forever until its gone? does fermentation ever stop so that I can close the lid?

    1. I’ve done something wrong because I got mold on my jars. I tossed the peppers and would like to try again. I used paper towels over the jars with tiny clean mason jars filled with water as fermentation weights. On day 7 the paper towels had mold on them and there was some mold on the inside top of the big jars as well. I’m not sure if the problem was using paper towels to cover the jars, if it was the little jars I used as fermentation weights, or if the problem was the cabinets in my old apartment. Any help would be appreciated.

      1. Oh shoot, Cooper. Yes, I am betting is was something to do with the paper towels. If the mold was growing on the towels, then that was the issue.

  9. Hi! I just made the fermented hot sauce. Once I’ve bottled it and covered with cheesecloth to avoid bursting, can I leave it at room temp without spoilage?


    1. Hi James- it will continue fermenting at room temp. So no it won’t spoil, but flavor will get more and more sour. I like to slow this down in the fridge. Leaving it out a night or two here and there not an issue, but storing permanently out of the fridge may alter the flavor to much?

    2. The safest way is to check the PH before bottling. There are various PH testers on Amazon. If the PH is below a certain level (4.4, I think?) the acidity makes it shelf stable. If the PH is too high, you can add vinegar until it is low enough. If you can’t check the PH, it’s best to keep it in the fridge.

  10. Love this recipe, but I messed up — I think — with my batches last year . . . and I’ve had them in my fermenter jars ever since. My jalapenno did ferment, but I lost sight of processing it because of a vacation we took. Is there an outer limit on when you would put it to pasture?

    On my cayenne, that never did seem to actually ferment so, I’m guessing I messed up the salt proportions. If it does NOT show any signs of fermenting, is it still any good? Or is it simply too old and also need to be put out to pasture?

    1. So it is a year old, Mark? And no signs of fermentation? Are your jars in a fridge or just at room temp? If in the fridge, I would smell it, see if it smells tangy or sour, and maybe taste, if you are comfortable. If they are at room temp, I personally would not chance it…
      When something is “iffy” I find that even if I do save it, thinking I might use it, usually I never do. It’s a mental thing! 😉

      1. Tossed both. Thank you for being the voice of reason.

        Oddly, I thought the jalapeno would have been the ‘bad’ one, but it actually smelled Ok.

        The cayenne, however, looked almost like it was all pickled, and I had wondered if I didn’t overdo the salt, meaning maybe I could adjust and reset. But it smelled ‘off’. Any way off telling if the salt proportion was too high or to a low? There was very little biologic activity (bubbles) right from the start and no cloudy white stuff ever formed.

        1. Great Mark-I would have done the same thing. Not sure how to tell at this point about salt content. Just always be extra careful with measuring.;)

  11. My fermented sauce is made, bottled and in the refrigerator, it’s one day old. But it’s too vinegary, can I add honey or baking soda to cut the vinegar now? Thanks for any help.

    1. I would wait a few days and then try it on something first- if you still feel it is too vinegary, then add a little honey. It will taste more like sriracha with the honey.

  12. My only disappointment in this recipe was that you didn’t include the weight ratio of salt to peppers et al. I’ve used your sauerkraut recipe several times, and the “weigh the cabbage and calculate the salt” is, in my opinion, the reason this recipe is consistent, reliable, and easy to modify in future batches.

      1. A standard fermenting brine is a 4% salt solution – for every 100g of water use 4g of salt. Krauts use a different ratio (2%), because the liquid comes from the vegetable itself.

        1. Thanks for clarifying Cait- 4% also will work here, but this is a 3% brine. Both work fine. 🙂

  13. Folk as clever as you shouldn’t have a problem with measuring something so simple as a cup or teaspoon.

    1. Folks as clever as we prefer the precision of grams along with the background science. Folks as insightful and intelligent as you should know that without explanation.

    1. I just finished 6 days of fermenting jalapenos, poblanos and garlic. No carrot since I wanted it bright green.

      After blending, it is a very weird consistency.. almost foamy? Should I strain the solids that are more or less separating or is this an issue of just blending more?

      Appreciate your help and btw, the taste is incredible!!

      1. Hey Courtney- I would blend more, then if it feels overly thick, you could strain some out if you like? Don’t strain all though.

        1. Ok thanks! I’ll see if the consistency gets better over the next day or two. Will probably not last long though since it tastes so good lol!

          1. The blende up chilies and veggies kind of start melting and blending after a week or so. 🙂

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