Dinner · Part 1 of 3: Ingredients
Sweet Pepper Garlic Butter Chuck Roast

- Prep
- Cook
- Total
- Serves
- 6
This is the set-it-and-forget-it dinner that delivers big flavor with almost no effort. A well-marbled chuck roast goes into the slow cooker with sweet peppers, onions, and thick slices of garlic-herb cowboy butter.
After hours of gentle simmering, the beef becomes fall-apart tender, the peppers soften into silky ribbons, and the butter transforms into a rich, savory gravy. Serve it over noodles or mashed potatoes for a comforting meal that feels like a special occasion.
The beauty of this recipe is its simplicity. You layer the ingredients, cover the pot, and walk away. The slow cooker does the rest, turning a tough cut of beef into spoon-tender perfection.
The garlic-herb butter melts into the meat and vegetables, creating a luscious sauce that coats every bite. It's the kind of meal that makes the whole house smell amazing and fills everyone at the table with anticipation.
Ingredients
- 3 1/2 lb beef chuck roast
- 2 red bell peppers, sliced into thick strips
- 2 green bell peppers, sliced into thick strips
- 2 medium yellow onions, sliced
- 4 oz garlic-herb compound butter (cowboy butter), cut into thick medallions
Why this recipe works
Chuck roast is the ideal cut for slow cooking. It has plenty of connective tissue and marbling that breaks down over low, moist heat, resulting in meat that shreds effortlessly.
The long, slow simmer also allows the flavors of the peppers, onions, and butter to meld into the beef, creating a deeply savory and aromatic dish. Because the roast is cooked in liquid, it stays moist and juicy, never dry or tough.
The garlic-herb compound butter serves a dual purpose: it adds rich flavor and creates a natural gravy as it melts. The butter, infused with garlic and herbs, coats the beef and vegetables, adding a luxurious finish.
By cooking on low for several hours, the ingredients meld together without any hands-on attention, making this an ideal weeknight dinner or a hassle-free weekend meal.
Notes and substitutions
Choose a chuck roast that is well-marbled with even thickness. This ensures even cooking and maximum tenderness. If you can, buy a roast that is already tied or trussed; it will hold its shape better during cooking. The peppers and onions should be sliced thick so they hold up during the long cook time and become soft, not mushy.
The garlic-herb cowboy butter is the star here. You can use store-bought compound butter or make your own by mixing softened butter with minced garlic, chopped fresh herbs like parsley and thyme, salt, and pepper. If you don't have cowboy butter, a simple mixture of butter, garlic, and Italian seasoning works well. The slow cooker does the work, so no searing is required.
- beef chuck roast: Beef brisket or bottom round roast work well; adjust cook time as needed.
- red and green bell peppers: Use any color bell peppers or a mix of sweet mini peppers.
- yellow onions: Sweet onions like Vidalia or Walla Walla are great here.
- garlic-herb compound butter: If you don't have compound butter, use 4 tablespoons unsalted butter mixed with 2 minced garlic cloves and 1 teaspoon dried Italian herbs.
Equipment
- 6-quart slow cooker
- Tongs
- Two forks for shredding
- Cutting board
- Chef's knife
- Measuring spoons
- Serving spoon
Up next · Part 2 of 3
6 steps · 8 h of cooking · what to look for at each stage
Step-by-step instructions (Part 2)