If you’re craving something warm, creamy, and absolutely satisfying, this Easy Flank Steak and Mushroom Soup with Sour Cream and Cabbage Noodles delivers comfort in every spoonful. Tender strips of perfectly seared flank steak soak up a velvety mushroom broth, infused with garlic, onions, and herbs. Topped with a generous dollop of sour cream and a nest of buttery cabbage noodles, it’s the kind of bowl you want to curl up with.

This dish is a celebration of texture and flavor—earthy mushrooms meet savory beef, and the soft, ribbon-like cabbage noodles add a gentle crunch and freshness to the richness of the soup. Whether you’re making it for a cozy weeknight dinner or serving it at a small gathering, this recipe will win hearts with its elegance and comfort-food soul.

What Cut of Beef Works Best for This Soup?

Flank steak is the star here, prized for its rich beefy flavor and how beautifully it soaks up the savory broth. You can sear it to a medium-rare or medium finish before slicing, ensuring tender strips that won’t go chewy in the soup. If you can’t find flank, skirt steak or sirloin will also do the trick.

Ingredients for the Easy Flank Steak and Mushroom Soup with Sour Cream and Cabbage Noodles

Flank Steak – Provides deep flavor and meaty texture. Sear it before slicing to lock in juiciness.
Mushrooms – A mix of baby bella and cremini offers an earthy base and rich umami flavor.
Yellow Onion – Adds subtle sweetness and depth to the broth.
Garlic Cloves – Infuses the broth with aromatic warmth.
Beef Broth – Forms the savory, comforting base of the soup.
Heavy Cream – Adds luxurious creaminess and richness.
Sour Cream – A tangy topping that balances the flavors beautifully.
Green Cabbage – Thinly sliced and sauteed into tender “noodles” that soak up the soup.
Butter – For sautéing the cabbage and mushrooms.
Parsley – A fresh garnish for color and flavor.
Salt & Pepper – Essential for seasoning each layer perfectly.

How To Make the Easy Flank Steak and Mushroom Soup with Sour Cream and Cabbage Noodles

Step 1: Sear the Flank Steak

Heat a large skillet or Dutch oven over medium-high heat. Season the flank steak with salt and pepper. Sear each side for about 3 minutes until browned. Remove, let it rest, and slice into thin strips against the grain.

Step 2: Saute the Mushrooms and Onions

In the same skillet, melt 2 tablespoons of butter. Add the sliced mushrooms and onions. Cook for 7-9 minutes until the mushrooms are golden and onions are soft. Stir in minced garlic and cook for 1 minute.

Step 3: Simmer the Broth

Pour in beef broth and bring to a gentle simmer. Add heavy cream and stir to combine. Let it simmer for 10-12 minutes, allowing the flavors to meld.

Step 4: Cook the Cabbage Noodles

While the soup simmers, heat a separate pan with butter and toss in the shredded cabbage. Sauté for 6-8 minutes until soft and lightly caramelized. Season with salt and pepper.

Step 5: Assemble and Serve

Add the sliced steak back into the soup for the final 2-3 minutes. Ladle the soup into bowls, top with a swirl of sour cream, spoonfuls of buttery cabbage noodles, and a sprinkle of parsley. Serve hot.

Serving and Storing This Flank Steak and Mushroom Soup

This soup is best enjoyed right after it’s made, especially when the steak is still tender and the cabbage noodles are warm and buttery. Store leftovers in an airtight container in the fridge for up to 3 days. When reheating, do so gently on the stovetop over low heat to maintain the creaminess.

What to Serve With Flank Steak and Mushroom Soup?

Crusty Artisan Bread

Perfect for soaking up every drop of the creamy mushroom broth.

Roasted Garlic Green Beans

A crisp, savory side that adds balance to the creamy soup.

Mashed Cauliflower

A lighter low-carb option that complements the richness beautifully.

Crispy Potato Cakes

Adds a crispy contrast and soaks in the broth like magic.

Buttery Cornbread Muffins

Sweet, fluffy muffins that round out the meal with comfort.

Roasted Parmesan Green Beans

For a cheesy crunch that brightens the bowl.

Simple Tomato Cucumber Salad

Fresh and acidic, the perfect palate cleanser.

Garlic Butter Roasted Carrots

Caramelized edges and buttery finish to enhance every bite.

Want More Soup Ideas with a Comfort Twist?

If you love this creamy and hearty steak soup, check out these other cozy comfort bowl recipes:

Creamy Beef and Shells Recipe for a pasta-meets-soup delight.
Creamy Broccoli Cheddar Soup for veggie lovers who crave richness.
Crock Pot Chicken Enchilada Casserole for southwest flavor in one dish.
Cabbage Fat Burning Soup when you want something healthy but still filling.
Cambodian Coconut Shrimp Soup for a fragrant tropical twist.

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And let me know in the comments how yours turned out. Did you use full-fat sour cream or a lighter version? Did you spice it up with paprika or thyme?

I love hearing how others make these recipes their own. Questions are welcome too—let’s help each other cook smarter.

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