This Asian-style, grilled, vegan Portobello Mushroom Burger is full of delicious umami flavor! It’s slathered with Asian-style Guacamole, topped with a cool cucumber ribbon salad and crunchy carrot slaw. Healthy, delicious and really satisfying. AND totally vegan. Video!
Oh my goodness, these Portobello Burgers are sooooooooo delicious! A flavorful umami bomb! Portobello mushrooms are brushed with a Miso-Sesame-Sriracha marinade, then grilled until perfectly juicy and tender.
They are layered up with a Japanese-style cucumber ribbon salad, a carrot slaw (or Asian Slaw) and the best part, as Asian style, avocado spread for the buns– seasoned with ginger & sesame, (aka Asian Guacamole). Full of flavor… and totally vegan!
Miso Portobello Mushroom Burger | 60-Second Video
Portobello Burger Components:
- Marinated Portobello Mushrooms
- Asian Guacamole “the sauce”
- Cucumber Ribbons
- Crunchy Asian Carrot Slaw (or sub Asian Slaw)
- Buns (or try Sourdough Buns!)
A few components, but honestly doesn’t take too long to put this together.
How to make the Best Portobello Burgers!
Step 1:
Prep the portobellos! Make the flavorful marinade. The umami flavored miso paste, blended with sriracha and sesame oil is delicious on portobello mushrooms!
Step 2:
Make the cucumber ribbon salad!
Cut baby cumbers into thin ribbons using a mandolin or veggie peeler. Or just cut them into thin disks, no problem! Season with the dressing!
Step 3:
Make the quick carrot slaw. I just used store-bought match stick carrots for this , but feel free to grate a carrot! You can also sub this Asian Slaw!
Step 4:
Make the Ginger Sesame Avocado Spread…. or “Asian Guacamole”.
Mash up a large avocado with fresh ginger, sesame oil and a splash of rice vinegar.
Step 5:
Grill the portobello mushrooms for the burgers. I always start with tops down…they’ll dry out less. Grill for 4-5 minutes over medium heat, giving them a nice sear, flip and cook for a couple more minutes. If you are particular (anal) like me, collect the juice from the mushroom caps before flipping and use that to baste the tops. Optional, but keeps them moist. 😉
Step 6:
Toast the buns! This is essential…..it keeps them from getting soggy!
Step 7:
Assemble the Portobello Burgers!
Spread the toasted buns lavishly with Avocado spread. This will keep the buns from getting soggy.
Top with the grilled portobello mushroom, gill- side up -to collect all the flavorful juices in the burger.
Pile everything on top of the grilled portobello.
Spread the bun tops with more avocado spread, and top the burger. Or, for a lower-carb option, feel free to serve the portobello burgers, open-faced, with knife and fork.
Other additions…..a squirt of sriracha and a little pickled ginger is nice.
This is my favortie vegan portobello burger and I can’t wait for you to try this and tell me what you think!
xoxo
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Spicy Miso Portobello Mushroom Burger (Vegan)
- Prep Time: 25
- Cook Time: 10
- Total Time: 35 minutes
- Yield: 2
- Category: Vegan, main, sandwich
- Method: grill
- Cuisine: Japanese, Asian, american
Description
This Asian-style, grilled, vegan portobello mushroom burger is full of delicious umami flavor! It’s lathered with Asian-style Guacamole, topped with a cool cucumber ribbon salad and crunchy carrot slaw. Healthy, delicious and really satisfying. AND totally vegan!
Ingredients
- 2 large portobello mushrooms
- 1 Tablespoon Miso ( any color)
- 1 tablespoon toasted sesame oil
- 1 tablespoon sriracha
- pinch of salt and pepper
Cucumber Ribbon Salad
- 2 turkish cucumbers, cut length-wise into ribbons ( use a mandolin– see notes)
- 1 scallion, sliced at diagonal
- 1/4 teaspoon salt
- ¼ teaspoon sugar
- 2 teaspoons rice vinegar
- ½ teaspoon toasted sesame seeds
Carrot Slaw ( to simplify this, see notes)
- 1 1/2 cups matchstick carrots ( or grated)
- 1 scallion
- 1/4 teaspoon salt
- ¼ teaspoon sugar
- 2 teaspoons rice vinegar
- ½ teaspoon toasted sesame seeds
Asian Guacamole
- 1 extra large avocado, cubed
- 1 teaspoon finely chopped ginger ( or use ginger paste)
- 1 teaspoon rice wine vinegar
- 1 teaspoon sesame oil
- ¼ teaspoon salt and pepper
- pinch chili flakes and sesame seeds
2 whole wheat buns, grilled
Optional additions- pickled ginger
Instructions
Preheat the grill. Using a fork or mini whisk, mix the miso, sriracha, and sesame oil ….& pinch salt and pepper together in a small bowl to make a paste. Brush liberally onto both sides of the portobello mushrooms.
Using veggie peeler or mandolin, cut the cucumber into long thin ribbons. (You can always just slice them into very thin disks) Place them in a medium bowl along with scallions and add the dressing ingredients and gently toss.
Make the carrot slaw the same way. Place in a small bowl, toss with dressing ingredients. To save time you can combine both the carrots and cucumber (and double the dressing) and serve them together in one bowl – but I prefer them separate, just for “prettiness”, but it’s not essential. 🙂
Make the Asian Guacamole, by placing everything in a small bowl, mashing and stirring a bit until creamy and combined. It doesn’t have to be smooth. Sprinkle with sesame and chili flakes.
Grill the portobellos, top sides down first, for 4-5 minutes over medium heat, until juicy and tender. Flip, grill a few more minutes. Grill the Buns.
Assemble the burgers….spread buns with generous amount of Asian Guac, place the portobello- gills side up ( to catch all the flavorful juices) then mound with cucumber ribbon and carrot salad, a little squeeze of sriracha, optional pickled ginger. Use the remaining Asian Guac on the bun tops, and top the burgers.
Eat immediately.
Notes
For a lighter meal you could serve these open-faced, with knife and fork without the top bun.
To save time you can combine the both the carrots and cucumber (and double the dressing) and serve them together in one bowl – but I prefer them separate, just for “prettiness”, but it’s not essential. 🙂
Keywords: vegan burger, portobello burger, vegan portobello burger, grilled portobello burger
Soooo good! My husband and I love Portobello burgers and have never had one this good. The umami flavor of the mushroom pairs so well with the fresh veggies (especially when they’re straight from the garden). Right after the first bite we knew this recipe would be a “keeper”. Highly recommended!
★★★★★
Great to hear Monica- thank you!
Now I want Asian guacamole every day. Thank you. Your recipes never disappoint!
★★★★★
Haha! Love it Allison! 😉
Ooh, this was so good- great range of flavors and textures unlike anything I’ve ever tasted. I used a slaw mix instead of carrots, but followed the recipe as is. A keeper for sure, and enjoyed by all, even the meat eaters.
★★★★★
Awesome!
I’m a vegetarian but my family is not. I served this entire meal as our 4 th of July Barbecue- it was fabulous and no one missed the meat. I served it with the Asian slaw. For starters I made veggie spring rolls with peanut sauce to set the mood and of course drinks. Thanks for a wonderful meal!!!
★★★★★
thanks Debra!
Bought soybean paste instead of miso by mistake…will that work? If so how much should I use…it seems extremely salty.
Ahhhh! Shoot Mari! I’ve never tried it. Miso is salty too though. Maybe start with half, add more to taste?
So delicious and so much flavor! I made these three days in a row. I can’t wait to try more of Sylvias recipes.
★★★★★
Thanks Jill!
I’m looking forward to making this! What would I serve as a side dish?
How about something light like Asian Slaw, or baked sweet potato fries?
You really don’t need a side with this recipe. However, I served it with speared cucumbers and extra guacamole for dipping. A red or yellow bell pepper and cherry tomatoes would be good for dipping also.
★★★★★
These are super yummy—every bit as tasty as a meat burger and definitely better than a Beyond Burger! You’ll enjoy every bite and even feel good after eating it! We’ll be having these a lot this summer.
Oh Thanks Tonya!xo
Great recipe, we really enjoyed it. We don’t eat bread so we didn’t bother with the bun- just a stack. Delicious thou perhaps a bit too much salt overall. I’d cut the salt in the guacamole next time.
★★★★★
thanks for the feedback!
WOW! Another home run! We didn’t want to eat buns due to the carbs, so we just stacked everything on top of the portabella and ate it with a knife and fork. It was so beautiful I had to take a picture. And, what a great combo of subtle flavors and textures! We just became vegan lifers. Thanks for helping our transition to be more fun and tasty! We owe you a great deal for your inspiring recipes! To health! <3
★★★★★
Thanks so much Marti!
Wonderful. I love the easy combinations of flavors for the marinades and sauces. The Asian Guacamole is amazing, so light and fresh tasting. Definitely a keeper!
Thanks Marie- so happy you liked it!
I agree! I had never thought of Asian guacamole and it was fabulous. Now I’m wondering if we can make Asian hummus. 🙂
★★★★★
Absolutely! Play with Edamame (instead of chickpeas) or Hummus with Furikake on top. 🙂
Another absolutely delicious recipe! I only had regular cucumber and that worked perfectly fine, I just used a potato peeler to create the ribbons since I’m sans mandolin. The flavor combination on these burgers is divine. I doubled the recipe knowing my husband and I would want to have it for dinner as well, and I was right.
★★★★★
Oh perfect! Glad you liked- yes veggie peeler is handy here!
This was by far the BEST burger we’ve had without meat. It was so dang delicious. We marinated the mushrooms for a few hours and wow. The next day I still keep dreaming about it. Please make this recipe!!
★★★★★
Great to hear!
This is my new favorite sandwich! A flavor bomb in your mouth! I let each component marinate for at least and hour to let the flavors develop and I put some crushed chili flakes in the cucumbers and carrots because I like a little extra kick. I used a grill pan for the mushroom. I would say to be sure to cut the carrots in match sticks. I was lazy and grated the carrots and they were very soft. They tasted great but had no crunch or texture
thanks Tammy- you can also usually buy matchstick carrots!
These burgers tantalize the taste buds. It went down a treat – and adding the miso is such a great way to create that Asian-style palette. Will be making these again for sure! Excellent stuff.
★★★★★
We loved this recipe! I used a soy free miso, but followed the recipe as written. We will have this again for sure. It would be a great meal for entertaining friends once we are back to in-person social time again. Thanks for the healthy, delicious recipe!
★★★★★
This one hit it out if the park! Wow! What great flavor! Its hard to learn to be plant based but with recipes like this becoming vegan is a culinary adventure!
The carrot cucumber slaw and Asian inspired guacamole were such an impressive accompaniment to the portobello. I am snacking on the carrot cucumber slaw as I write this. So yummy! Maybe just a little less sesame oil in the guacamole. Other than that we are going to make these again and again!
★★★★★
This is SO delicious! Thanks so much for this great recipe- it is a keeper!!
★★★★★
Would it be possible to make this without a grill?
Yes. You could roast the portobellos in the oven, or use a grill pan on the stove.
SO DELICIOUS! Can’t believe how easy this was to make also!
★★★★★
This burger was AMAZING. Start with letting the portabello marinate! I was frustrated when I made this that the sauce for the carrots and cucumbers is the same and I wasted time making two small batches of the same sauce. But if you’re thinking about making this, do it! SO good!!
★★★★★
Fantastic! Soooo tasty and flavourful. Great recipe
Continue your great work.
I omitted the sugar simply because I don’t cook with it
★★★★★
I had this last night absolutely loved it nice flavours and I didn’t miss the meat at all
★★★★★
So delicious. Prepped the carrots and cucumber the night before to let them really marry and I couldn’t believe how good it was. This is a keeper.
★★★★★
These are so delicious and they are so quick and easy to make!
★★★★★
This was my first Feasting at Home recipe, and it was fantastic! The only changes I made were to grate the carrots for a finer slaw, and I made my own hamburger buns. My husband said this was the best “burger” I have ever made. I agreed, they were so flavorful and juicy. I will definitely be adding this recipe to my dinner repertoire.
★★★★★
Awesome Zoey!
Made for our vegan friends last night and it was a hit! Made everything as is and loved it. Looking forward to trying more of your recipes.
★★★★★