Slow-Cooker Cheddar Fajita Beef Barbacoa

This slow-cooker cheddar fajita beef barbacoa is the ultimate set-and-forget dinner. Just layer beef chuck cubes, rainbow bell peppers, red onion, lime juice, and a generous amount of cream cheese and sharp cheddar into your slow cooker, then let it work its magic.

After hours of gentle simmering, you get melt-in-your-mouth shredded beef bathed in a molten, cheesy sauce with tender-crisp vegetables. Serve it over rice or in tortillas for a meal that feels like a fiesta.

This recipe brings together the rich, savory flavor of beef barbacoa with the bright, colorful crunch of fajita vegetables, all enveloped in a creamy cheddar and cream cheese sauce. It's a one-pot wonder that requires minimal prep and delivers maximum comfort.

The slow cooker does all the work, transforming tough chuck cubes into fork-tender shreds that soak up the cheesy goodness. Perfect for busy weeknights or casual gatherings, this dish is sure to become a family favorite.

Ingredients

Why this recipe works

The slow cooker provides a low, moist heat that breaks down the collagen in beef chuck, turning it irresistibly tender. Cooking on LOW for 8 hours allows the meat to become shreddable while the peppers and onions soften but still hold a little texture.

The cream cheese and cheddar melt into a luscious, velvety sauce that clings to every strand of beef, creating a rich, cohesive dish.

This method is foolproof: just layer the ingredients and walk away. Because everything cooks together, the flavors meld and deepen without any extra steps.

The lime juice adds a bright, acidic note that cuts through the richness, while the peppers and onions provide a sweet, savory counterpoint. The result is a balanced, satisfying meal that tastes like it simmered all day — because it did.

Notes and substitutions

Choose beef chuck cubes for the best results — they have enough fat and connective tissue to become tender and flavorful. If you prefer a leaner option, brisket or round steak can work, but adjust the cooking time as needed. The peppers can be any combination of red, yellow, and orange; green peppers are more bitter, so use them sparingly.

Use full-fat cream cheese and sharp cheddar for the richest sauce. Reduced-fat cheeses can turn grainy when melted. If you like a little heat, add a diced jalapeño or a pinch of cayenne with the vegetables. For a gluten-free meal, serve over rice or with corn tortillas.

• beef chuck cubes: beef stew meat or brisket, cut into 2-inch cubes
• sharp cheddar: Monterey Jack or a Mexican cheese blend
• fresh lime juice: bottled lime juice (use 1 1/2 tbsp)
• red onion: white or yellow onion, sliced

Equipment

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