Best-Kept Secret Creamy Mushroom Soup

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

A velvety mushroom soup with a secret ingredient that elevates it beyond ordinary, featuring earthy wild mushrooms and cream. This american-inspired soups ready in about 50 minutes pairs mixed mushrooms, medium yellow onion, unsalted butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 20 min Cook: 30 min Serves 6 American cuisine 320 cal/serving
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Ingredients

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Instructions

  1. Step 1: Finely chop 1 medium yellow onion and slice 12 oz mixed mushrooms. Melt 4 tbsp unsalted butter in a large pot over medium heat.
  2. Step 2: Add onion and mushrooms to the pot, cooking for 8 minutes until mushrooms release liquid and brown slightly, stirring occasionally.
  3. Step 3: Sprinkle 3 tbsp all-purpose flour over mushrooms and cook for 1 minute, stirring constantly to form a roux.
  4. Step 4: Slowly whisk in 4 cups chicken stock while scraping the bottom of the pot, then bring to a gentle simmer.
  5. Step 5: Reduce heat to low, stir in 1 tbsp fresh thyme, 1 tsp sea salt, and 1/2 tsp black pepper. Simmer uncovered for 15 minutes.
  6. Step 6: Stir in 1 cup heavy cream and simmer for 5 more minutes until soup thickens slightly and coats the back of a spoon.

Frequently asked questions

How long does Best-Kept Secret Creamy Mushroom Soup take to make?

Total time is about 50 minutes (20 min prep + 30 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Best-Kept Secret Creamy Mushroom Soup?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep mixed mushrooms from drying out.

Can I substitute ingredients in Best-Kept Secret Creamy Mushroom Soup?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Best-Kept Secret Creamy Mushroom Soup for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Best-Kept Secret Creamy Mushroom Soup?

American soups like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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