Creamy, earthy, and utterly cozy—this Slow Cooker Creamy Mushroom Soup is the ultimate comfort food for cool evenings or when you crave something hearty without the hassle. With a deep umami flavor from fresh mushrooms and a silky texture from cream and broth, this soup feels like a warm hug in a bowl.

The beauty of this recipe lies in its simplicity: minimal prep, a handful of ingredients, and your slow cooker doing most of the work. Whether you’re making a big batch for family dinner or meal-prepping for the week, this soup delivers flavor and convenience in equal measure.

Preparation Phase & Tools to Use

To create the perfect Slow Cooker Creamy Mushroom Soup, here are the tools that make all the difference:

Slow Cooker: The heart of this recipe. It allows all the ingredients to meld slowly, enhancing the flavors and tenderizing the mushrooms to perfection.
Cutting Board & Sharp Knife: You’ll need these for slicing mushrooms and prepping aromatics. A sharp knife ensures clean cuts without bruising the mushrooms.
Wooden Spoon or Silicone Spatula: Ideal for stirring the soup gently before and after cooking without scratching your slow cooker.

Ladle: For easy serving into bowls, especially helpful when portioning for guests or meal prep.
Immersion Blender (Optional): If you like your soup extra creamy, a quick blend can smooth out the texture without dirtying another pot.

Having these tools on hand will streamline the process and make your cooking experience efficient and enjoyable.

Ingredients for the Slow Cooker Creamy Mushroom Soup

Each ingredient in this soup brings its own magic to the bowl:

Fresh Mushrooms (cremini, button, or a mix) – The star of the show. These provide a deep, earthy flavor and meaty texture.
Onion – Adds aromatic sweetness and depth, enhancing the overall savoriness.

Garlic – For that unmistakable punch of warmth and flavor.
Vegetable or Chicken Broth – The base that carries all the flavors. Opt for low-sodium if you prefer to control salt levels.
Heavy Cream – Brings richness and a silky finish to the soup.

Butter – Used to sauté aromatics and build a luxurious foundation.
Flour (or cornstarch) – A gentle thickener that adds body to the soup.
Thyme (dried or fresh) – Gives a lovely herbal note that complements mushrooms beautifully.

Salt & Black Pepper – For balancing and seasoning to taste.
Parsley (optional, for garnish) – A pop of freshness and color to finish each bowl.

How To Make the Slow Cooker Creamy Mushroom Soup

Step 1: Prep the Mushrooms and Aromatics

Gently clean the mushrooms with a damp paper towel and slice them evenly. Chop the onions and mince the garlic. This ensures even cooking and balanced flavor throughout.

Step 2: Sauté for Extra Depth

In a skillet over medium heat, melt butter and add the onions and garlic. Cook until fragrant and slightly golden, then toss in the mushrooms. Sauté for about 5-7 minutes to deepen the umami flavor.

Step 3: Transfer to Slow Cooker

Add the sautéed mixture to your slow cooker along with broth, thyme, salt, and pepper. Stir to combine everything evenly.

Step 4: Slow Cook It Low and Easy

Cover and cook on LOW for 6-8 hours or HIGH for 3-4 hours. The mushrooms will become tender, and the flavors will meld into a delicious broth.

Step 5: Cream and Thicken

Whisk together the cream and flour (or cornstarch) in a small bowl. Stir it into the soup about 30 minutes before serving, then continue cooking on HIGH. This adds the creamy body and thickness.

Step 6: Blend for Smoothness (Optional)

For a creamier texture, use an immersion blender to partially or fully blend the soup directly in the slow cooker. Be cautious not to over-blend if you want to keep some mushroom chunks.

Step 7: Serve and Garnish

Ladle the soup into bowls and top with chopped parsley or an extra swirl of cream. Serve warm with crusty bread or a side salad.

Serving and Storing Your Creamy Mushroom Soup

This soup is best enjoyed piping hot, served with warm, crusty bread or a side of buttery crackers. It also pairs wonderfully with a light green salad for a balanced meal.

When serving guests, consider offering toppings like shredded cheese, croutons, or a drizzle of truffle oil for an elevated touch.

For storage, let the soup cool completely before transferring to an airtight container. It can be refrigerated for up to 4 days or frozen for up to 2 months. Reheat gently over the stove or in the microwave, stirring occasionally to keep the creamy texture intact.

Frequently Asked Questions

What kind of mushrooms work best?

Cremini and white button mushrooms are excellent, but a blend with shiitake or portobello adds extra depth and richness.

Can I make it dairy-free?

Yes! Substitute the cream with coconut milk or a plant-based alternative. Use olive oil instead of butter for sautéing.

Is it possible to use frozen mushrooms?

While fresh mushrooms are preferred for texture, frozen ones can work in a pinch. Just be sure to drain excess liquid before adding them.

How do I make it gluten-free?

Swap the flour with cornstarch or a gluten-free thickener when mixing with cream.

Can I prep this ahead of time?

Absolutely. You can sauté the mushrooms and aromatics the night before and refrigerate until you’re ready to start the slow cooker in the morning.

Does it freeze well?

Yes, it freezes beautifully. Just avoid overcooking the cream when reheating to prevent separation.

Want More Soup Ideas with Creamy Comfort?

If this Slow Cooker Creamy Mushroom Soup hit the spot, you’ll love diving into these other rich and cozy soup recipes from Life With Olivia:

Creamy Parmesan Italian Sausage Soup – A hearty soup full of bold sausage flavor and cheesy creaminess.
Hearty Creamy Ditalini Soup for Chilly Nights – Packed with pasta and comforting flavors perfect for cold evenings.

Creamy Alfredo Lasagna Soup – Lasagna in a bowl? Yes, please.
Rich Creamy Mushroom Stroganoff – If you love mushrooms, this twist on stroganoff is a must.
Hearty Vegetarian Tortellini Soup – A flavorful meatless option that doesn’t skimp on comfort.

Save This Recipe for Later

📌 Save this recipe to your Pinterest soup board so you can come back to it anytime: Life With Olivia Pinterest

Let me know in the comments how your batch turned out! Did you go extra creamy or keep the mushrooms chunky? Any custom touches you added?

I love hearing how these recipes come to life in your kitchens. And if you have any questions or tips to share, drop them below—we’re all here to cook and grow together.

Slow Cooker Creamy Mushroom Soup

Author: Olivia McKenney
Total Time: 8 hours
Yield: 6

Diet: Vegetarian

Print Recipe

Description

Slow Cooker Creamy Mushroom Soup is a rich, earthy, and comforting meal made with fresh mushrooms, onions, and herbs, slowly simmered to perfection and finished with heavy cream for that irresistible velvety texture. It’s an easy, hands-off recipe perfect for cozy nights, meal prep, or crowd-pleasing dinners.

Instructions

1. Gently clean the mushrooms and slice them evenly. Chop the onion and mince the garlic.

2. In a skillet over medium heat, melt the butter and sauté the onion and garlic until translucent. Add mushrooms and sauté for 5–7 minutes to release their flavor.

3. Transfer the sautéed mix to the slow cooker. Pour in the broth, add thyme, salt, and pepper. Stir everything together.

4. Cover and cook on LOW for 6–8 hours or on HIGH for 3–4 hours, until mushrooms are tender.

5. In a bowl, whisk together the cream and flour or cornstarch until smooth. Stir into the soup 30 minutes before serving.

6. Let it cook uncovered on HIGH for the final 30 minutes to thicken.

7. Use an immersion blender if you prefer a smoother texture. Blend partially or fully depending on your preference.

8. Garnish with chopped parsley or an extra drizzle of cream, and serve warm.

Notes

For added depth, try mixing in a few shiitake or portobello mushrooms with the base variety.

To make the soup gluten-free, use cornstarch instead of flour when thickening.

Always blend carefully—don’t over-blend if you like mushroom chunks in your soup.

Prep Time: 15 minutes

Cook Time: 6–8 hours
Category: Soup
Method: Slow Cooker

Cuisine: American

Nutrition

Serving Size: 1 cup
Calories: 210

Sugar: 3g
Sodium: 480mg
Fat: 17g

Saturated Fat: 10g
Unsaturated Fat: 6g
Trans Fat: 0g

Carbohydrates: 10g
Fiber: 2g
Protein: 4g

Cholesterol: 50mg

Keywords: creamy mushroom soup, slow cooker soup, vegetarian soup