Craving a warm, creamy soup but want to skip flour? This mushroom soup without flour is an easy homemade option that delivers plenty of rich mushroom flavor without using a traditional flour-based roux.
Made with fresh mushrooms, garlic, onion, broth, butter, and cream, this soup comes together in about 30 minutes. It is comforting enough for a cold evening but simple enough for a quick weeknight lunch or dinner.
The best part is that you don’t need complicated ingredients or special cooking skills. A portion of the mushrooms can be blended into the broth to create a naturally thick and creamy texture.
Why You’ll Love This Mushroom Soup
- No flour: Great if you’re avoiding flour in your soup.
- Creamy texture: Blended mushrooms and cream create a rich consistency.
- Quick to make: Ready in around 30 minutes.
- Simple ingredients: Uses everyday pantry and refrigerator staples.
- Full of mushroom flavor: Sautéing the mushrooms first adds extra depth.
- Easy to customize: Add herbs, cheese, or extra vegetables if desired.
Ingredients You’ll Need
For this easy mushroom soup without flour, you’ll need:
- 1 pound fresh mushrooms, sliced
- 1 tablespoon butter
- 1 tablespoon olive oil
- 1 small yellow onion, finely chopped
- 3 cloves garlic, minced
- 4 cups chicken or vegetable broth
- 1 cup heavy cream
- 1 teaspoon dried thyme
- ½ teaspoon salt
- ¼ teaspoon black pepper
- 2 tablespoons chopped fresh parsley
- ½ teaspoon lemon juice, optional
Tip: Cremini mushrooms provide a deeper flavor than white button mushrooms, but either works well.
How to Make Mushroom Soup Without Flour
1. Clean and Slice the Mushrooms
Gently clean the mushrooms and slice them evenly. Avoid soaking them in water because mushrooms can absorb moisture and become difficult to brown.
2. Sauté the Mushrooms
Heat the butter and olive oil in a large pot over medium-high heat. Add the mushrooms and cook for about 6–8 minutes, stirring occasionally.
Let some of the mushrooms develop a golden-brown color. This helps create a deeper, richer flavor in the finished soup.
Remove about ½ cup of the cooked mushrooms and set them aside for topping.
3. Cook the Onion and Garlic
Add the chopped onion to the same pot. Cook for 3–4 minutes until softened.
Add the minced garlic and thyme. Cook for another 30–60 seconds, just until fragrant.
4. Add the Broth
Pour in the broth and stir well, scraping up any browned bits from the bottom of the pot.
Bring the mixture to a gentle boil, then reduce the heat and simmer for about 10 minutes.
5. Blend the Soup
For a smooth texture, use an immersion blender directly in the pot.
You can also transfer the soup carefully to a regular blender in batches.
For a more textured soup, blend only about half of the mixture and leave some mushroom pieces whole.
Important: If using a countertop blender, allow steam to escape and blend carefully to prevent pressure from building up.
6. Add the Cream
Reduce the heat to low and stir in the heavy cream.
Season with salt and black pepper. Warm the soup gently for another 2–3 minutes, but avoid boiling it rapidly after adding the cream.
Stir in a small amount of lemon juice if you want to brighten the mushroom flavor.
7. Serve
Ladle the soup into bowls and top with the reserved sautéed mushrooms and fresh parsley.
Serve immediately with crusty bread, crackers, or a simple green salad.
How Does This Soup Get Thick Without Flour?
Traditional creamy mushroom soup often uses flour to thicken the broth. This recipe takes a different approach.
Blending the cooked mushrooms into the broth naturally makes the soup thicker and gives it a smooth texture. Heavy cream adds additional richness without requiring flour.
For an even thicker soup, blend more of the mushrooms instead of adding extra cream.
Tips for the Best Mushroom Soup
Brown the mushrooms well.
Don’t overcrowd the pot. Give the mushrooms enough space to release moisture and develop golden edges.
Use a combination of mushrooms.
Cremini, button, shiitake, or oyster mushrooms can be combined for a more complex flavor.
Don’t boil the cream.
Keep the heat low after adding cream to help maintain a smooth texture.
Blend according to your preference.
Fully blended soup will be smoother, while partially blended soup gives you noticeable mushroom pieces.
Taste before serving.
Mushrooms and broth vary in saltiness, so adjust the seasoning at the end.
Mushroom Variations You Can Try
You can easily change this homemade mushroom soup based on what you have available.
Garlic Mushroom Soup
Increase the garlic to 4–5 cloves for a stronger garlic flavor.
Mushroom and Spinach Soup
Add a couple of handfuls of fresh spinach during the final few minutes of cooking.
Mushroom Parmesan Soup
Stir in a small amount of finely grated Parmesan cheese after reducing the heat.
Dairy-Free Mushroom Soup
Replace the heavy cream with unsweetened coconut cream or another suitable dairy-free alternative. Keep in mind that this will change the flavor slightly.
What to Serve With Mushroom Soup
This creamy soup pairs well with:
- Crusty sourdough bread
- Garlic bread
- Grilled cheese sandwiches
- Roasted vegetables
- Simple green salads
- Toasted baguette slices
It can work as a light lunch or as a starter before a larger dinner.
How to Store Leftover Mushroom Soup
Allow leftover soup to cool before transferring it to an airtight container.
Store it in the refrigerator and use it within 3–4 days.
When reheating, warm it gently over medium-low heat. Avoid bringing the soup to a rapid boil, especially because it contains cream.
You can also freeze the soup, although cream-based soups may separate slightly after thawing. Stirring well while reheating can help improve the texture.
FAQ
Can you make mushroom soup without flour?
Yes. Mushrooms can be blended into the broth to naturally thicken the soup, while cream adds richness and body.
What can I use instead of flour to thicken mushroom soup?
Blended mushrooms, potatoes, cauliflower, or a small amount of cornstarch slurry can be used depending on the desired texture.
Is mushroom soup without flour gluten-free?
The ingredients in this recipe can be gluten-free, but always check your broth and other packaged ingredients for gluten-containing additives if you need to avoid gluten strictly.
Can I use milk instead of heavy cream?
Yes, but the soup will be lighter and less rich. For a creamier result, half-and-half is a good middle-ground option.
Can I use canned mushrooms?
Fresh mushrooms are recommended because they provide better texture and flavor. Canned mushrooms can work in a pinch, but drain them well before cooking.
Conclusion
This mushroom soup without flour proves that you don’t need flour to make a thick, creamy, and satisfying homemade soup. Fresh mushrooms, garlic, broth, and cream create a flavorful base, while blending the mushrooms gives the soup its naturally creamy texture.
Make it for a cozy weeknight dinner, serve it as a starter, or pair it with crusty bread for a simple lunch. It’s an easy recipe that’s flexible enough to customize with your favorite mushrooms and herbs.
