Name: Mushroom Spinach Soup with Croutons Recipe
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American
Ingredients: 4 tablespoons unsalted butter (½ stick); ½ cup onion, diced; 16 ounces mushrooms, sliced (baby bella or any variety); 1 tablespoon garlic, minced; 1 teaspoon dried thyme or 1 tablespoon fresh thyme; 3 tablespoons all-purpose flour; 2 cups whole milk or Half and Half; 2 cups vegetable broth; 3 cups baby spinach; Kosher salt and freshly cracked black pepper to taste; ½ cup croutons

Jump to Recipe· 3.9 from 78 reviews

If you crave a cozy, comforting bowl of goodness that fills both your belly and soul, this Mushroom Spinach Soup with Croutons Recipe is an absolute must-try. Earthy mushrooms and tender, vibrant spinach come together in a creamy, herb-laced broth that’s bursting with flavor. Topped with crunchy croutons for that perfect texture contrast, each spoonful is a harmonious blend of softness and crispness — ready in just 30 minutes, it’s a delightful way to elevate any lunch or dinner with minimal fuss and maximum satisfaction.

Ingredients You’ll Need

The image shows a wooden board with fresh cooking ingredients arranged on it. Starting from the left side, a bunch of fresh green spinach leaves lies spread out with small cubes of light brown, toasted bread in front of them. Above the spinach is a whole yellow-brown onion and a small green container of thyme. In the center, there is a large pile of sliced brown mushrooms with a glass measuring cup of light yellow milk placed behind them and a glass jug filled with a dark brown liquid. To the right of the mushrooms, there is a small white plate holding several pale yellow cubes of butter. In the bottom right corner, two cloves of white garlic rest on the board. The background is a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

The beauty of this Mushroom Spinach Soup with Croutons Recipe lies in its simplicity. With basic kitchen staples that bring unique flavors and textures, every ingredient plays a starring role in crafting this luscious soup.

Unsalted butter (4 tablespoons): Melts smoothly to sauté aromatics and mushrooms, adding rich creaminess.
Onion (½ cup, diced): Provides a sweet and savory base flavor that melts into the broth.
Mushrooms (16 ounces, sliced): Baby bella or your favorite variety, supplying earthiness and depth.
Garlic (1 tablespoon, minced): Infuses the soup with a warm, fragrant bite.
Dried thyme (1 teaspoon) or fresh thyme (1 tablespoon): Adds a subtle herbal lift that complements mushrooms perfectly.
All-purpose flour (3 tablespoons): Acts as a natural thickener, creating a creamy texture without heaviness.
Whole milk or half and half (2 cups): Ensures the soup is luxuriously creamy—skip skim for best results.
Vegetable broth (2 cups): Builds a flavorful, light base that lets the other ingredients shine.
Baby spinach (3 cups): Adds vibrant color, freshness, and a gentle leafy bite.
Kosher salt and freshly cracked black pepper: Season to bring out every nuance of flavor.
Croutons (½ cup): Provide a crunchy topping that brightens each spoonful.

How to Make Mushroom Spinach Soup with Croutons Recipe

Step 1: Sauté the Aromatics and Mushrooms

Start by melting the butter in a large pot over medium-high heat. Once it’s foaming gently, toss in the diced onions, sliced mushrooms, minced garlic, and a pinch of salt. Sauté this mixture for about 5 minutes until the onions soften and mushrooms release their juicy, savory goodness. Stir frequently to ensure everything cooks evenly and nothing sticks.

Step 2: Add Flour to Thicken

Sprinkle the flour over the mushroom mixture, stirring constantly to coat everything evenly. Cook for 1 minute to get rid of the raw flour flavor, being careful not to let it scorch or cling to the pot’s bottom. This step is crucial for crafting that perfectly velvety soup texture.

Step 3: Pour in the Broth and Milk

Gradually pour in the vegetable broth, scraping up any browned bits from the pot — that’s where much of the flavor lives! Next, add the whole milk or half and half and bring the soup to a boil over high heat. Once boiling, turn the heat down to a gentle simmer and let it bubble quietly for 8 to 10 minutes, stirring occasionally to keep everything moving and combined beautifully.

Step 4: Wilt the Spinach

Finally, toss in the fresh baby spinach and stir until it wilts and softens, turning the soup an inviting shade of green and adding freshness to the rich, creamy broth. Season with kosher salt and freshly cracked black pepper to taste.

Step 5: Serve with Croutons

Ladle the steaming soup into bowls and generously top with crunchy croutons. They add an irresistible texture contrast that makes every bite exciting and satisfying.

How to Serve Mushroom Spinach Soup with Croutons Recipe

A blue bowl on a white marbled texture holds a creamy soup with a light brown color and visible specks of herbs. Inside the soup are pieces of green spinach leaves, brown mushroom slices, and small cubes of light orange bread. Above the bowl, a spoon lifts a round brown mushroom piece sitting on top of the thick soup, with drops of soup falling back into the bowl. The background shows a blurred view of distant hills under a bright blue sky. photo taken with an iphone --ar 4:5 --v 7

Garnishes

While the classic croutons steal the show as a topping, feel free to add a sprinkle of freshly chopped parsley or a drizzle of good quality olive oil to brighten the flavors. A few shaved parmesan curls pair wonderfully if you enjoy a little extra richness.

Side Dishes

This soup stands well on its own but pairs beautifully with fresh crusty bread, a crisp green salad, or even a grilled cheese sandwich for a meal that feels indulgent yet wholesome. Light and fresh sides help balance the creaminess of the soup.

Creative Ways to Present

For a charming touch, serve the soup in rustic bread bowls that soak up the flavors as you eat. Or, if entertaining, present it as a starter in small cups adorned with a single crouton and a sprig of thyme for that wow factor.

Make Ahead and Storage

Storing Leftovers

Store any leftover soup in an airtight container in the refrigerator. It will keep well for up to 3 days while retaining its fresh flavors and creamy texture.

Freezing

This soup freezes beautifully! Pour cooled soup into freezer-safe containers, leaving a little room for expansion. Freeze for up to 2 months. Remember to add croutons only after reheating to maintain their crunch.

Reheating

Reheat gently on the stovetop over medium-low heat, stirring often to prevent scorching. Add a splash of milk or broth if the soup seems too thick. Top with fresh croutons just before serving.

FAQs

Can I use other types of mushrooms?

Absolutely! While baby bella mushrooms provide great flavor and texture, cremini, shiitake, or even a wild mushroom mix will work wonderfully and add different earthy notes.

Is there a dairy-free option for this recipe?

Yes! Swap the butter for olive oil and use unsweetened almond or oat milk along with a vegetable broth base. Keep in mind the soup will be lighter but still delicious with these adjustments.

Can I make this soup vegan?

Definitely. Use olive oil instead of butter, plant-based milk, and ensure the vegetable broth is vegan-friendly. That way, the Mushroom Spinach Soup with Croutons Recipe remains rich and flavorful without animal products.

How do I keep the soup creamy without using cream?

Using whole milk or half and half is key here; low-fat or skim milk will make the soup thin. The flour thickening technique also helps create creaminess without heavy cream.

What’s the best way to make homemade croutons?

Simple! Cube day-old bread, toss with olive oil, salt, pepper, and a bit of garlic powder, then bake at 375°F (190°C) until crispy and golden, about 10-15 minutes. Homemade croutons always elevate the soup.

Final Thoughts

This Mushroom Spinach Soup with Croutons Recipe is pure comfort in a bowl, easy enough for a weeknight but impressive enough to share with friends and family. With its delightful mix of flavors and textures, it’s a guaranteed crowd-pleaser you’ll find yourself coming back to again and again. Give it a try—you’re going to love how simple ingredients can transform into such a satisfying meal.