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Creamy Mushroom Soup with Rosemary and Garlic - a delicious easy recipe that is Keto friendly and perfect for special  gatherings or simple enough for weeknight dinners! Serve this with crusty bread for a simple hearty meal!  #mushroomsoup #mushroomsouprecipe #mushroomrecipes #ketosoup

Mushroom Soup Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.9 from 69 reviews
  • Author: Sylvia Fountaine | Feasting at home
  • Prep Time: 10
  • Cook Time: 20
  • Total Time: 30 minutes
  • Yield: 4 1x
  • Category: Soup, vegetarian
  • Method: stovetop
  • Cuisine: French
  • Diet: Vegetarian


Mushroom Soup with Rosemary and Garlic – a delicious easy recipe that is Keto friendly and perfect for special gatherings or simple enough for weeknight dinners! Serve this with crusty bread for a simple hearty meal! GF and Vegan adaptable!


Units Scale
  • 4 tablespoons olive oil, butter or vegan butter
  • one large onion, diced (or two fat shallots)
  • 4 garlic cloves, rough chopped (24 more for garnish, sliced)
  • 1 lb cremini mushrooms, sliced ( or use mushrooms of your choice)
  • 1/2 teaspoon salt
  • 1 tablespoon fresh rosemary, chopped (or thyme)
  • 1/4 cup sherry cooking wine (not vinegar) or marsala wine or red wine
  • 5 tablespoons flour (or GF flour)
  • 3 cups hot veggie broth, chicken stock, or beef broth (or use water with bullion cubes) see notes.
  • 1/2 cup to 1 cup sour cream ( 3/4 cup seems just right) or use vegan sour cream, cashew cream (or use heavy cream)
  • pepper to taste
  • Optional garnish: drizzle of truffle oil, garlic “chips” ( see notes) croutons, crusty bread!


  1. Heat oil or butter in a large, heavy-bottom pot or dutch oven. Add onion and saute over medium-high heat, 3-4 minutes, stirring constantly until golden and fragrant. Lower heat to medium, add garlic, saute 2 minutes.
  2. Add the sliced mushrooms, salt and rosemary. Saute 10-12 minutes, stirring occasionally, taking your time here, allowing mushrooms to release all their liquid. Add the cooking sherry (do not mistake this for sherry vinegar).  Turn the heat up, and cook this completely off, stirring until most or all of the liquid in the pan has cooked off about 3-4 minutes, and mushrooms glisten.  Optional: Set aside 1/4 cup mushrooms for garnish.
  3. Turn the heat back down to medium, sprinkle the flour over top, stir constantly, toasting it for 1-2 minutes. Add one cup of hot stock and stir it in WELL, getting all those browned bits (in corners and bottom) mixed in. (A wood spoon works well here.) Add the second cup of stock, stirring well to combine, then add the third cup of stock and bring it to a gentle simmer, whisking. It will thicken.
  4. Stir in the sour cream until fully incorporated.
  5. Season with pepper and taste for salt.
  6. If you would like a thinner soup, add a little more broth, readjusting the salt.
  7. To make the garlic chips, thinly slice garlic (the long ways). Heat 2 tablespoons oil in a little saute pan over medium heat. Add the garlic slices, not overlapping, sprinkle with a little salt, and turn over when golden, about 3 minutes.  Cook other side until golden and crispy. Set on a paper towel. At the same time you could toss in a few more rosemary leaves.
  8. To Serve: Ladle in bowls and top with a few slices of mushrooms and garlic chips and a drizzle of truffle oil. Serve with crusty bread.


The best (tastiest) version of this soup is using butter and sherry cooking wine. The sherry elevates. It’s still really good with Marsala wine, red wine or even dry white wine, but tastes best with the sherry cooking wine, adding a complex sweetness that is heavenly.  

If you prefer a pureed soup- feel free to blend or blend half.

Though the type of broth or stock is totally adaptable here – chicken broth to me has the best flavor. Or use vegan “chicken” broth. Beef broth adds a delcious depth as well. If going with straight veggie broth, sometimes I’ll add a teaspoon or two of miso to the hot broth for extra depth.

Of course, you can make this vegan with olive oil (or vegan butter) and using a vegan sour cream or cashew cream. If going the cashew cream route, remember that sour cream has a bit of tangy sourness to it, so you may need to add a bit of acid- a few drops of lemon juice or vinegar to taste.

Store leftovers in the refrigerator in an airtight storage container for up to 4 days.


  • Serving Size: 1 ⅓ cup
  • Calories: 351
  • Sugar: 7 g
  • Sodium: 588 mg
  • Fat: 22.9 g
  • Saturated Fat: 6.5 g
  • Carbohydrates: 26.2 g
  • Fiber: 2.7 g
  • Protein: 12.8 g
  • Cholesterol: 20.5 mg