This cold mushroom soup is a smooth blended soup made with fresh mushrooms, onion, vegetable broth, a little cream, and fresh herbs added at the end. It is lighter than a classic cream of mushroom soup, but still has that deep mushroom taste you want from a proper homemade soup.

This recipe is based on my YouTube video, with a few adjustments since publication. I increased the butter slightly, gave the cream a clear measurement, and clarified the salt because vegetable broth can change everything. I make it this way because mushrooms need enough fat, time, and heat to release their water before the broth goes in. The mistake to avoid is boiling everything quickly without sweating the mushrooms first. At that point, the soup tastes flat instead of round and earthy.

Cold Creamy Mushroom Soup with Fresh Herbs

Why This Recipe Works

The base is simple: mushrooms, onion, butter, broth, herbs, and cream. The important part is the order. First, the onion needs to soften gently in butter without browning. Then the mushrooms go in and cook until they begin to collapse and release moisture. You should smell the mushrooms before you add the broth. That is the sign you are building flavor.

I prefer to keep this soup lighter than a heavy cream soup. The mushrooms are the main ingredient, not the cream. The cream is there to soften the edges and give a smooth finish, especially once the soup is chilled.

This version is different from a hot, thick, winter-style soup. It is also different from my richer pasta dishes like creamy mushroom pasta or a full main dish like creamy mushroom chicken thighs. This one is a cold or lukewarm starter, smooth, fresh, and easy to serve ahead.

What Makes This Mushroom Soup Different

A lot of mushroom soups are built like a classic cream soup with flour, heavy cream, and a thicker texture. This one is more of a cold mushroom potage. It is blended smooth, but it does not need flour or a roux.

The basil and chives give it a fresher finish. That is important because cold soups need a bit of brightness. When food is cold, the seasoning feels softer, so you need a good mushroom base and a final taste after chilling.

If you want something richer and warmer, try a soup like creamy tomato soup or broccoli cheddar soup. If you want a cold, simple mushroom soup for summer, this is the better fit.

Ingredients

2 lb white mushrooms or cremini mushrooms, cleaned and sliced
1 medium onion, chopped
3 tbsp unsalted butter
4 cups vegetable broth, preferably homemade or low-sodium
1 1/4 tsp fine salt, only if using unsalted broth
Black pepper, to taste
8 to 10 fresh basil leaves, chopped
2 tbsp fresh chives, chopped
2/3 cup 15% cream or light cream
1 to 2 tsp lemon juice, optional
Fresh basil leaves or chopped chives, for serving

Step-by-Step Instructions

1. Prepare the vegetables

Clean the mushrooms and slice them. They do not need to be perfect because everything will be blended. Chop the onion into small pieces so it softens evenly.

If onion cutting always feels like the slow part, I have a practical guide on how to cut an onion that keeps the pieces even without making the job complicated.

What I look for here is simple: mushrooms ready in a bowl, onion chopped, herbs washed, and broth measured. Once the pot is hot, the recipe moves quickly.

2. Sweat the onion

Place a large pot over medium-low heat. Add the butter and let it melt gently. It should foam a little, but it should not brown.

Add the chopped onion with a small pinch of salt. Cook for 3 to 4 minutes, stirring often. The onion should look glossy and soft, not golden. If it starts to brown, lower the heat.

This step matters because browned onion gives a stronger, sweeter flavor. For this soup, I prefer a clean mushroom taste, so I keep the onion pale.

3. Add the mushrooms

Add the sliced mushrooms to the pot. At first, the pot will look very full. That is normal. Stir well so the mushrooms get coated with the butter and onion.

Cook for 6 to 8 minutes, stirring often. The mushrooms should soften, shrink, and release some moisture. You will hear less dry scraping in the pot and more gentle sizzling as the juices come out.

At this point, it should smell earthy and buttery. If the mushrooms still look raw and stiff, give them another few minutes before adding the broth.

4. Add broth and simmer

Pour in the vegetable broth. Add black pepper and salt only if your broth is unsalted or very low in salt.

This is important. If you are using boxed broth or bouillon cubes, do not add all the salt right away. Start with less, then adjust at the end. I explain this more in my guide on how to season a recipe properly, but the short version is simple: broth already has salt, and soup reduces as it cooks.

Bring the pot to a gentle boil, then lower the heat. Simmer uncovered or partially covered for about 30 minutes. You want a little evaporation so the mushroom flavor concentrates.

5. Add the herbs at the end

Turn off the heat. Add the chopped basil and chives. Let them sit in the hot soup for 2 to 3 minutes.

Do not boil the herbs for 30 minutes. Basil loses its fresh smell when it cooks too long. I like adding it right at the end because it gives the soup a fresher finish, especially if serving cold.

6. Blend until smooth

Blend the soup with an immersion blender directly in the pot, or carefully transfer it to a blender in batches.

Blend until very smooth. You know it is ready when the texture looks even and velvety, with no visible mushroom pieces. If using a regular blender, do not fill it too high with hot liquid. Work in batches and let steam escape safely.

If the soup looks too thick after blending, add a little broth. If it seems too thin, simmer it uncovered for a few more minutes before adding the cream. For more help with texture, my guide on how to thicken a sauce also applies to soups and blended bases.

7. Add cream and adjust

Stir in the cream. Taste the soup.

This is where the recipe becomes yours. Add more pepper if it needs warmth. Add a little salt if the mushroom flavor tastes muted. Add 1 to 2 teaspoons of lemon juice if the soup tastes good but slightly flat.

The lemon is optional, but I like it in a cold soup because it wakes up the mushrooms without making the soup taste lemony.

If you need a dairy-free or lighter option, use the ideas from what to use instead of cream and choose something mild so the mushroom flavor stays in front.

8. Chill before serving

Let the soup cool for 20 to 30 minutes, then transfer it to the fridge. Chill for at least 3 hours, or until completely cold.

Taste again once chilled. This is not optional for me. Cold soup often needs a final adjustment because the salt and herbs feel softer when cold.

Serve in bowls with a basil leaf, chopped chives, a small drizzle of cream, or a few thin slices of raw mushroom on top.

Nutrition and Serving Context

This is a lighter creamy soup, not a heavy meal by itself. The mushrooms bring body and a savory flavor, while the cream adds smoothness without turning the soup into something too rich.

Serve it as a starter, a light lunch, or a make-ahead soup for warm weather. It also works year-round. In summer, serve it cold. In fall or winter, serve it warm or lukewarm with toast, garlic bread, or a salad.

Substitutions

Mushrooms

White mushrooms give a clean, mild flavor. Cremini mushrooms make the soup a little darker and deeper. You can also mix both.

Avoid using only very strong wild mushrooms unless you know the flavor you want. They can dominate the soup quickly.

Cream

Light cream works well. Heavy cream makes the soup richer, but it can hide the mushroom flavor. Half-and-half also works.

For a dairy-free version, use an unsweetened plant-based cream. Choose something neutral. Coconut milk is possible, but it will change the flavor.

Vegetable broth

Homemade broth is ideal. Low-sodium store-bought broth is also fine. If using bouillon cubes, reduce the added salt and adjust after blending.

For a deeper flavor, you can use mushroom broth.

Herbs

Basil and chives are the video-style finish. Parsley can replace chives. Tarragon works too, but use less because it has a stronger flavor.

Butter

Butter gives the best flavor here. Olive oil works if you want a dairy-free base, but the soup will taste less round.

What to Serve With It

Because this soup is smooth and light, I like serving it with something crisp or fresh on the side.

For bread, air fryer garlic bread is a good match because the garlic gives contrast without needing a full meal. For something more bistro-style, classic pommes boulangères works well beside a warm version of this soup.

If you want to keep the meal light, serve it with classic macaroni salad or a fresh plate like grilled chicken Caesar salad.

For a soup-focused menu, pair it with another simple bowl like minestrone with pasta and beans, New England clam chowder, fish soup, or potage Parmentier. Each one has a different texture and flavor direction, so they do not compete with this mushroom soup.

FAQ

Can I serve this soup hot?

Yes. The recipe was made as a cold mushroom soup, but it also works warm or lukewarm. If serving hot, heat it gently after adding the cream. Do not boil it hard once the cream is in.

Why is my soup too thin?

The most common reason is that the soup was simmered covered, or the mushrooms released more water than expected. Simmer it uncovered for a few minutes after blending, before adding the cream. You can also use a little less broth next time.

Why is my soup too salty?

The broth was probably already salted. Vegetable broth and bouillon cubes vary a lot. Start with less salt if using store-bought broth, then adjust at the end.

Can I make it ahead?

Yes. This soup is actually better when made ahead because it needs time to chill. Make it the day before, refrigerate it, then taste and adjust before serving.

How long does it keep?

Keep it refrigerated in an airtight container for up to 3 days. Stir before serving because the texture can settle slightly.

Can I freeze it?

You can freeze the soup before adding cream. Thaw, reheat gently, blend again if needed, then add cream after warming. Creamy soups can separate after freezing, so the texture is better if the cream is added fresh.

Can I use milk instead of cream?

Yes, but the soup will be lighter and slightly less smooth. If using milk, add it at the end and do not boil the soup hard.

Cold Creamy Mushroom Soup with Fresh Herbs

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Prep Time 15

Cooking Time 35

Category Entrée

Cuisine French-inspired

Portions 6 servings

Calories 145 kcal

Ingredients

2 lb white mushrooms or cremini mushrooms cleaned and sliced
1 medium onion chopped
3 tbsp unsalted butter
4 cups vegetable broth preferably homemade or low-sodium
1 1/4 tsp fine salt only if using unsalted broth
Black pepper to taste
8 to 10 fresh basil leaves chopped
2 tbsp fresh chives chopped
2/3 cup 15% cream or light cream
1 to 2 tsp lemon juice optional
Fresh basil leaves or chopped chives for serving

Instructions

Clean and slice the mushrooms. Chop the onion. Chop the basil and chives, then set them aside.
Melt the butter in a large pot over medium-low heat.
Add the onion and cook for 3 to 4 minutes, stirring often, until soft and glossy without browning.
Add the mushrooms and cook for 6 to 8 minutes, until they soften, shrink, and release moisture.
Add the vegetable broth, pepper, and salt if using unsalted broth.
Bring to a gentle boil, then lower the heat and simmer uncovered or partially covered for 30 minutes.
Turn off the heat. Add the basil and chives and let infuse for 2 to 3 minutes.
Blend until completely smooth.
Stir in the cream. Add lemon juice if desired.
Taste and adjust the seasoning.
Let cool, then refrigerate for at least 3 hours.
Taste again once cold, adjust if needed, and serve with basil, chives, or a small drizzle of cream.

Video

Notes

FAQ