Cream of Mushroom Soup

Deeply browned mushrooms simmered with thyme and finished with cream. It's richer than anything from a can and thickened without flour.

  • Net carbs7.7 g
  • Prep10 min
  • Cook30 min
  • Serves4
✓ Vegetarian✓ Gluten-free✓ Egg-free✓ Nut-free
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Nutrition per serving

1 cup
Net carbs
7.7g
Calories
322kcal
Protein
6.1g
Fat
31g
Total carbs
9.4 g
Fiber
1.7 g
83% fat

Calculated from USDA FoodData Central values for each ingredient (optional ingredients excluded). Brands vary — check your labels if you track closely.

A low-carb swap for: wheat flour (23 g net per ¼ cup) , cream of mushroom soup (condensed) (7.7 g net per ½ cup condensed) . This recipe has 7.7 g per serving.

Ingredients

4 servings
Version

Estimated cost $9.79 for 4 servings ($2.45 each) · how we estimate

Instructions

  1. Melt 1 tbsp of the butter in a large pot over medium-high heat. Add half the mushrooms in a single layer and leave them alone 2–3 minutes until browned underneath, then stir and cook 2–3 minutes more until golden and their liquid has evaporated. Transfer to a bowl and repeat with another tablespoon of butter and the rest of the mushrooms.

  2. Return all the mushrooms to the pot with the last tablespoon of butter. Lower the heat to medium, add the shallot, garlic and thyme, and cook 2 minutes until softened and fragrant.

  3. Pour in the wine, if using, and scrape up the browned bits from the bottom as it bubbles away, about 1 minute.

  4. Add the broth, bring to a boil, then simmer 15 minutes. Set aside a few mushroom slices for garnish and blend the soup with an immersion blender — fully smooth or with some texture left.

  5. Stir in the cream and return to a gentle simmer. Sprinkle the xanthan gum over the surface while whisking, then simmer 3–5 minutes until the soup coats the back of a spoon. Season with salt and pepper and top with the reserved mushrooms and parsley.

Tips for success

  • Don't crowd the pan. Mushrooms that steam instead of brown make a gray, bland soup — the deep browning is where the flavor comes from.
  • Need a stand-in for canned condensed soup in a casserole? Simmer an extra 10–15 minutes until reduced by about half; 1¼ cups replaces one 10.5-oz can.
  • Spoon it over pork chops or seared chicken as a quick pan sauce.

Nice to have, not needed

  • A splash of dry sherry or white wine deepens the flavor — the soup is still rich without it.

Storage & meal prepMeal-prep friendly

  • Keeps 4 days in the fridge
  • Freezes up to 2 months

Reheat: Reheat over medium-low heat, whisking well, until steaming.

Prep tip: Freeze in 1¼-cup portions — each one replaces a can of condensed soup in casseroles.

Refrigerate up to 4 days, or freeze up to 2 months. Whisk well as it reheats, since cream soups can separate slightly after freezing.

Variations

3 variations, each with its own ingredients and macros

Creamy chicken & mushroom

Protein

Seared chicken thigh pieces simmered in a chunkier version of the soup make it a hearty, stew-like dinner.

  • vegetable or chicken broth → chicken broth
  • + 1 lb boneless, skinless chicken thighs

6.8 g net · 461 kcal · 29 g protein · 36 g fat · ≈$3.44 per serving (−0.9 g net carbs vs the original)

Vegan

Diet

Olive oil and full-fat coconut milk replace the butter and cream, and a little tamari deepens the savory flavor. Well-browned mushrooms keep the coconut in the background.

  • butter → olive oil
  • heavy cream → canned coconut milk
  • + 1 tsp tamari

7.8 g net · 252 kcal · 5.7 g protein · 23 g fat · ≈$2.38 per serving (+0.1 g net carbs vs the original)

Wild mushroom

Veggies

A mix of cremini, shiitake and portobello gives a deeper, earthier, almost meaty flavor than one kind of mushroom alone.

  • cremini or white mushrooms → cremini mushrooms
  • + 4 oz shiitake mushrooms
  • + 1 large portobello cap

8.3 g net · 325 kcal · 5.6 g protein · 31 g fat · ≈$3.68 per serving (+0.6 g net carbs vs the original)

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