Prepare the Vegetables: Slice the mushrooms and finely chop the onion. Crush the garlic and set aside.
Sauté the Mushrooms: In a large pot, melt the butter over medium heat. Add the mushrooms and cook for 8–10 minutes, stirring occasionally, until tender and lightly golden.
Build the Base: Add the onion and garlic to the pot and cook for another 4–5 minutes, until softened and fragrant. Sprinkle in the flour and cook for 2 minutes, stirring constantly to remove any raw flour taste.
Simmer the Soup: Pour in the vegetable stock. Season with salt, pepper, nutmeg, and thyme. Bring to a boil, then reduce the heat and simmer gently for 30 minutes.
Blend and Finish: Remove from heat and blend the soup until completely smooth. Return to low heat, stir in the cream, and simmer for 10 minutes. Taste and adjust seasoning if needed.
Video
Notes
Mushrooms: Button, cremini, or a mix of mushrooms all work well. For deeper flavor, add some shiitake or portobello.
White Wine: For extra depth, deglaze the pot with ¼ cup dry white wine after cooking the mushrooms. Let it reduce before adding flour.
Consistency: Use 4 cups stock for a thick, velvety soup or up to 6-8 cups for a lighter, more pourable texture.
Herbs: Thyme pairs beautifully with mushrooms, but rosemary or sage also work. Fresh herbs give a brighter finish.
Mix-Ins: Add sautéed mushroom slices, crispy croutons, grated Parmesan, or a drizzle of truffle oil before serving.
Lighter Version: Replace the cream with half-and-half, evaporated milk, or leave it out entirely for a lighter (still creamy) soup.