Sweet Pepper Garlic Butter Bottom Round Roast

This slow-cooker bottom round roast is the definition of set-it-and-forget-it cooking. A well-marbled beef roast is nestled under sweet bell peppers, onions, and thick slices of garlic-herb cowboy butter, then left to simmer low and slow until it's fall-apart tender.

The result is a rich, buttery gravy that coats every shred of beef and soft, sweet peppers. Serve it over egg noodles or mashed potatoes for a satisfying dinner that tastes like you spent hours in the kitchen—when you actually just walked away.

This recipe turns a budget-friendly cut of beef into a luxurious, fork-tender meal with almost no effort. The bottom round roast is lean but becomes incredibly tender after hours of gentle braising in the slow cooker.

Sweet bell peppers and onions break down into silky strands, while the cowboy butter—a blend of butter, garlic, and herbs—melts into a savory sauce that flavors every bite. It's a one-pot dinner that's perfect for busy weekdays or lazy weekends, and it's sure to become a family favorite.

Ingredients

Why this recipe works

The magic of this recipe lies in the slow cooking method. Bottom round roast is a tough, lean cut that needs low, moist heat to break down its collagen and connective tissue.

Cooking it on low for 8 to 10 hours allows the meat to become meltingly tender without drying out. The slow cooker creates a sealed, steamy environment that gently braises the beef, turning it into shreds that soak up the buttery, garlicky juices.

The cowboy butter is the flavor powerhouse. As it melts, the butter blends with the natural juices of the beef and the sweetness of the peppers and onions, creating a rich, emulsified gravy.

The garlic and herbs infuse the entire pot, so every bite is aromatic and savory. This simple combination—meat, vegetables, and compound butter—proves that you don't need a long list of ingredients to make a memorable meal.

Notes and substitutions

Choose a well-marbled bottom round roast if possible; the fat adds flavor and moisture during cooking. If you can only find a leaner roast, that's fine—the slow cooking and butter will compensate. For the peppers, use a mix of red and green for color and sweetness. Red peppers are sweeter, while green peppers add a slightly bitter edge that balances the rich butter.

Garlic-herb compound cowboy butter is available in many grocery stores, but you can easily make your own by mixing softened butter with minced garlic, parsley, thyme, and a pinch of salt and pepper. If you prefer a milder flavor, use unsalted butter and add salt to taste at the end. The dish is forgiving, so feel free to adjust the herbs to what you have on hand.

• beef bottom round roast: chuck roast or brisket (same weight, adjust cooking time if needed)
• garlic-herb compound cowboy butter: store-bought garlic herb butter, or mix 4 tbsp softened butter with 2 minced garlic cloves and 1 tsp dried parsley
• bell peppers: any color bell peppers, or use 2 cups sliced poblano peppers for a mild heat
• sweet yellow onion: white or red onion (sweeter varieties work best)

Equipment

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