Creamy Mushroom Soup

The Philosophy of This Soup

This method builds flavor in layers. First, you caramelize the mushrooms to develop a deep, meaty, umami taste. Then, the flour acts as a light binder to give the soup a silky texture, while the cream (added at the end) enriches it without overwhelming the earthy mushroom flavor.

Ingredients

The Base (Provided)

• 2 tablespoons butter

• 1 tablespoon olive oil

• 1 onion, finely chopped

• 2 cloves garlic, minced

• 1 lb mushrooms, sliced (a mix of cremini, white, and shiitake works well)

• 1/4 cup all-purpose flour

The Liquid & Finish

• 4 cups (32 oz) low-sodium chicken or vegetable broth

• 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)

• 1 teaspoon salt (start with less, adjust later)

• 1/2 teaspoon black pepper

• 1 cup heavy cream (or half-and-half for a lighter version)

• 1 tablespoon sherry or dry white wine (optional, but recommended for depth)

• Fresh parsley, chopped (for garnish)

Instructions

Part 1: Sweat the Aromatics

1. Heat the Fat: In a large pot or Dutch oven, heat the butter and olive oil over medium heat until the butter is melted and bubbling.

2. Cook the Onion: Add the finely chopped onion and cook for 5-7 minutes, stirring occasionally, until soft and translucent. Do not let it brown.

Part 2: Cook the Mushrooms

1. Add Garlic: Add the minced garlic and cook for 1 minute until fragrant.

2. Add Mushrooms: Add all the sliced mushrooms. Stir to coat them in the onion mixture.

3. Brown the Mushrooms: Cook the mushrooms for 8-10 minutes, stirring only occasionally. You want them to release their liquid, and then that liquid to cook off so they can brown. The browning is crucial for deep flavor. They will shrink significantly.

Part 3: Make the Roux

1. Sprinkle Flour: Sprinkle the ¼ cup of flour evenly over the cooked mushrooms and onions.

2. Stir and Cook: Stir constantly for 2-3 minutes. This cooks the raw taste out of the flour. The mixture will look like a thick, sticky paste coating the mushrooms (this is your roux).

Part 4: Deglaze and Simmer

1. Add Broth Slowly: Slowly pour in about 1 cup of the broth, stirring constantly to scrape up the browned bits from the bottom of the pot. Once smooth, add the remaining 3 cups of broth, thyme, salt, and pepper.

2. Bring to a Simmer: Increase the heat and bring the soup to a gentle boil, then reduce the heat to low.

3. Simmer: Cover and let it simmer for 15-20 minutes, stirring occasionally. This allows the flavors to meld and the soup to thicken slightly.

Part 5: Finish and Serve

1. Add Cream: Reduce the heat to the lowest setting. Stir in the heavy cream and the sherry or wine (if using). Heat through gently for about 5 minutes. Do not let it boil after adding the cream, or it may curdle.

2. Taste and Adjust: Taste the soup and adjust seasoning with more salt and pepper if needed.

3. Serve: Ladle into bowls and garnish with fresh parsley. Serve with crusty bread for dipping.

Pro-Tips for the Best Mushroom Soup

• Don’t Crowd the Pan: If your pot isn’t huge, cook the mushrooms in two batches. If they are too crowded, they will steam instead of brown, and you’ll miss out on that deep, savory flavor.

• Clean Mushrooms Properly: Never soak mushrooms! They act like sponges. Wipe them clean with a damp paper towel or give them a quick rinse and pat them dry immediately.

• Make it Elegant: Before adding the flour, scoop out a few spoonfuls of the cooked mushrooms and set them aside. Add them back at the end (after blending or before serving) for nice texture and visual appeal.

• For a Smoother Soup: Use an immersion blender directly in the pot to puree the soup to your desired consistency before adding the cream. You can make it completely smooth or leave some chunks for texture.