Slow Cooker Creamy Mushroom Soup

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Comfort food doesn’t get much cozier than a bowl of slow cooker creamy mushroom soup. This recipe transforms a humble medley of mushrooms, garlic, herbs, and cream into a deeply savory and velvety soup that tastes like it came from a fancy bistro — all with minimal effort thanks to your slow cooker.

Whether you’re craving a warm lunch on a rainy afternoon or need a simple dinner that practically makes itself, this soup brings both ease and elegance. With a bit of prep and the magic of slow simmering, you get rich earthy flavors and an ultra-smooth texture perfect for dipping crusty bread or enjoying solo.

Why You’ll Love This Slow Cooker Creamy Mushroom Soup

This recipe is a dream for mushroom lovers. The long, slow cook brings out the full depth of flavor in every bite, while the creamy base adds comfort without being too heavy. It’s naturally vegetarian (or even vegan with a few swaps), and flexible enough to work as a light meal, appetizer, or cozy side. Bonus: your home will smell amazing all day long.

What Kind of Mushrooms Should I Use?

A mix of mushrooms adds the best complexity. Cremini mushrooms are a great starting point, but throw in some shiitakes, baby bellas, or even a few dried porcini for deeper umami. If you’re sticking to what’s on hand, white button mushrooms will still do the trick, especially with a good broth and herbs to round it out.

Ingredients for the Slow Cooker Creamy Mushroom Soup

To make this soup rich, hearty, and packed with umami, each ingredient plays a key role. Here’s what you’ll need:

• Mushrooms
• Yellow onion
• Garlic cloves
• Vegetable broth
• Unsalted butter
• Heavy cream
• Fresh thyme
• Salt
• Black pepper
• Flour

Mushrooms bring the earthy heart of the dish and offer both texture and deep flavor. A blend creates layers of umami.

Yellow onion adds sweetness and body when sautéed before going into the slow cooker.

Garlic cloves infuse warmth and aroma, balancing the earthiness of the mushrooms.

Vegetable broth is the flavorful liquid that allows everything to simmer into a rich base.

Unsalted butter helps sauté the mushrooms and onions and adds richness.

Heavy cream delivers the creamy finish that makes the soup luxurious.

Fresh thyme adds a gentle herbaceous lift to each spoonful.

Salt and black pepper are crucial for seasoning and bringing out the mushroom flavors.

Flour thickens the soup just enough for that satisfying spoonful.

How To Make the Slow Cooker Creamy Mushroom Soup

Step 1: Sauté the Aromatics

Start by sautéing the butter, onions, and garlic in a skillet over medium heat until softened and fragrant. Add the mushrooms and cook just until they start to release their moisture and brown slightly. This step helps deepen the flavor before slow cooking.

Step 2: Load the Slow Cooker

Transfer the sautéed mix to your slow cooker. Stir in the vegetable broth, fresh thyme, salt, and pepper. Cover and cook on low for 6 to 7 hours, or on high for about 3 hours.

Step 3: Blend It Up

When everything is tender and aromatic, use an immersion blender to puree the soup right in the slow cooker. You can also carefully transfer it to a blender in batches for a smoother result. Leave a few mushroom bits intact if you like some texture.

Step 4: Add Cream and Finish

Whisk the flour into the heavy cream until smooth, then stir this into the soup. Cover and cook for an additional 30 minutes on high until the soup thickens slightly. Taste and adjust seasoning as needed.

Serving and Storing Your Mushroom Soup

This recipe makes about 4 to 6 generous servings, perfect for a family dinner or meal prepping lunches for the week. Serve hot with a drizzle of olive oil, a dollop of sour cream, or a handful of fresh herbs on top.

Leftovers keep well in the fridge for up to 4 days, and the flavors get even better overnight. You can also freeze it for up to 2 months—just skip the cream and add it fresh when reheating if you plan to freeze.

What to Serve With Slow Cooker Creamy Mushroom Soup?

Crusty Garlic Bread

To soak up every last drop of the creamy broth.

Simple Green Salad

A refreshing contrast to the richness of the soup.

Grilled Cheese Sandwich

Classic comfort food pairing that never gets old.

Roasted Veggies

Add more color and texture to your plate with roasted carrots or Brussels sprouts.

Savory Scones

Cheese or herb scones work beautifully with the earthy mushroom flavors.

Baked Potato

Split one open and spoon the soup right over for a hearty twist.

Apple Walnut Salad

For a touch of sweetness and crunch.

Want More Soup Ideas with a Comforting Kick?

If you loved this creamy mushroom soup, check out some of our other warming favorites:

• Creamy Kielbasa Gnocchi Soup
• Zesty Tuscan Artichoke Soup
• Irresistible Crock Pot Crack Potato Soup
• Greek Lemon Chicken Soup (Avgolemono)
• Creamy Garlic Butter Shrimp Scampi Lasagna

Save This Recipe For Later

📌 Save this recipe to your Pinterest soup board so you can come back to it any time.

And let me know in the comments how yours turned out. Did you try different mushrooms or add a splash of white wine? Maybe a vegan twist with coconut cream?

I love hearing how others put their spin on classic comfort food. Questions are always welcome—let’s help each other cook better, one cozy soup at a time.

Explore beautifully curated comfort meals and more cozy recipes on Luna Meals on Pinterest and discover your next favorite spoonful.

Conclusion

Slow cooker creamy mushroom soup is everything we want in a cold-weather dish: easy, rich, and full of nourishing flavor. It blends rustic charm with creamy indulgence and fills your kitchen with irresistible aromas. Let it simmer while you go about your day, then enjoy a bowl that warms you from the inside out.

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