Bourbon Gravy Flank Steak: 5-Ingredient Crockpot Dinner

This slow cooker flank steak recipe is the ultimate dump-and-go dinner. Just layer thinly sliced beef, pearl onions, carrots, and a jar of bourbon-mushroom gravy into the Crockpot, add a few pats of butter, and walk away.

Eight hours later, you’ll have fork-tender meat and sweet, glazed vegetables in a rich, glossy gravy. Serve it over rice for a complete meal that feels like a special occasion but requires almost no effort. Perfect for busy weeknights or lazy weekends when you want dinner to take care of itself.

This recipe turns a handful of simple ingredients into a deeply savory, comforting meal. The flank steak becomes incredibly tender after hours of gentle simmering, while the pearl onions and carrots soften and sweeten in the bourbon-laced gravy. The best part?

There’s no browning, no stirring, and no fuss. Just layer everything in the slow cooker, set the timer, and let time work its magic. The result is a rich, satisfying dinner that tastes like you spent hours in the kitchen—but you didn’t. It’s the kind of meal that makes a weekday feel like a Sunday supper.

Ingredients

Why this recipe works

Slow cooking transforms a tough, lean cut like flank steak into fork-tender pieces. The low, moist heat breaks down the connective tissue, releasing gelatin that thickens the gravy and coats every bite.

Because the beef is sliced thin, it cooks evenly and absorbs the surrounding flavors, resulting in meat that’s both succulent and deeply seasoned. The long cooking time also allows the pearl onions and carrots to release their natural sugars, which caramelize gently and balance the savory, smoky notes of the bourbon gravy.

The beauty of this method lies in its simplicity. Layering the ingredients without stirring means the beef stays in contact with the gravy, ensuring it doesn’t dry out. The butter adds richness and helps create a velvety sauce.

And because everything cooks together, the flavors meld and deepen over the hours, producing a complex, restaurant-quality dish with minimal effort. This is the kind of recipe that proves you don’t need a dozen steps or a lot of hands-on time to make something truly delicious.

Notes and substitutions

Flank steak is the star here, but you can also use sirloin or chuck roast. Slice it thinly against the grain for the best texture. Pearl onions are available frozen, peeled, or fresh; if using fresh, blanch them briefly to loosen the skins. Crinkle-cut carrots add visual appeal and hold their shape well during long cooking. If you can’t find crinkle-cut, regular baby carrots work fine.

The mushroom-bourbon gravy is the key to the rich flavor. Look for a good-quality jarred gravy in the grocery store. If you prefer, you can substitute with beef gravy and add a splash of bourbon and extra mushrooms. Salted butter adds seasoning and richness, but unsalted butter works too—just add a pinch of salt at the end if needed. Avoid using low-fat butter, as it may not melt as smoothly into the sauce.

• flank steak: sirloin steak or chuck roast, thinly sliced
• pearl onions: 1 small yellow onion, cut into wedges
• crinkle-cut carrots: baby carrots or sliced regular carrots
• mushroom-bourbon gravy: 1 (12 oz) jar beef gravy plus 2 tbsp bourbon and 1/2 cup sliced mushrooms

Equipment

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