Gruyère Cream Broccoli Flank Steak Crockpot Dinner

This slow cooker dinner is the ultimate set-it-and-forget-it meal. Thinly sliced flank steak, broccoli, and mushrooms simmer low and slow in a rich, velvety sauce made with cream cheese and Gruyère.

The result is fork-tender beef and perfectly cooked vegetables in a luxurious, cheesy gravy that begs to be sopped up with crusty bread. All you do is layer the ingredients in the Crockpot, walk away, and come back to a bubbling, aromatic dinner that tastes like you spent hours in the kitchen.

This recipe turns a handful of everyday ingredients into a deeply satisfying, restaurant-quality dinner with almost no effort. Flank steak is sliced thin and cooked low and slow until it's melt-in-your-mouth tender.

Broccoli and mushrooms hold their shape and soak up the creamy, nutty sauce. The combination of cream cheese and Gruyère creates a rich, smooth sauce that coats every bite. Perfect for busy weeknights, this dump-and-forget meal delivers big flavor with minimal cleanup.

Ingredients

Why this recipe works

The slow cooker's low, steady heat works magic on flank steak. This cut is naturally lean and can be tough if cooked quickly, but hours of gentle simmering break down the connective tissue, transforming it into fork-tender, succulent bites. The thin slices ensure the beef cooks evenly and absorbs the flavors of the sauce.

Cream cheese and Gruyère are a match made in heaven. Cream cheese melts into a silky base, while Gruyère brings a nutty, slightly sweet depth. Together, they create a sauce that clings to the beef and vegetables without becoming heavy. The broccoli and mushrooms add texture and earthiness, balancing the richness beautifully.

Notes and substitutions

For the best texture, slice the flank steak against the grain into thin strips. This shortens the muscle fibers, making each piece tender. If you prefer a different cut, sirloin or chuck roast also work well.

Broccoli florets should be uniform in size so they cook at the same rate. Baby bella mushrooms add a meaty, umami flavor that pairs perfectly with the beef.

Use full-fat cream cheese for the creamiest sauce—reduced-fat versions can sometimes turn grainy. Gruyère is the star here, but Swiss or white cheddar can be substituted in a pinch.

A 6-quart slow cooker is ideal for this quantity; if using a smaller one, reduce the ingredients proportionally. No need to precook anything—everything goes in raw and emerges perfectly cooked.

• flank steak: sirloin steak or chuck roast, thinly sliced
• broccoli florets: broccolini or cauliflower florets
• baby bella mushrooms: white button mushrooms or cremini mushrooms
• Gruyère cheese: Swiss cheese or white cheddar

Equipment

• 6-quart slow cooker
• Cutting board
• Chef's knife
• Measuring cups
• Measuring spoons
• Serving spoon