Slow-Cooker Pepper Jack Fajita Skirt Steak

This slow-cooker fajita skirt steak is the ultimate hands-off dinner. Just layer the meat, peppers, and cheese sauce in the crockpot, set it, and walk away. Hours later, you’ll have tender, juicy steak and soft, sweet peppers in a creamy, spicy cheese sauce. Serve it over rice or scoop it up with tortilla chips for a meal that feels like a fiesta.

Fajitas are a weeknight favorite, but traditional stovetop versions require constant attention. This slow-cooker version flips the script: you simply dump in the ingredients and let the crockpot do the work.

The skirt steak becomes incredibly tender, the peppers soften and caramelize, and the queso and pepper jack melt into a rich, creamy sauce that coats everything. It’s a complete meal in one pot, perfect for busy days when you want something hearty and satisfying without the fuss.

Ingredients

Why this recipe works

The slow cooker’s low, moist heat breaks down the connective tissue in skirt steak, turning a tough, chewy cut into fork-tender pieces.

This gentle cooking method also allows the flavors of the peppers, onions, and lime to meld with the cheese sauce, creating a deeply savory, slightly tangy dish that tastes like it simmered all day — because it did.

Layering the ingredients without stirring is key. The steak sits on the bottom, where it cooks in its own juices and the melting cheese. The peppers and onions stay on top, steaming and softening without turning to mush.

The queso blanco and pepper jack melt together into a smooth, creamy sauce that clings to every bite, giving you that crave-worthy, restaurant-style texture.

Notes and substitutions

Skirt steak is the classic choice for fajitas because it has great beefy flavor and becomes tender when cooked low and slow. If you can’t find it, flank steak or sirloin strips work well.

Cut the meat against the grain for the most tender results. The bell peppers — red, yellow, and orange — add sweetness and color; green peppers are more bitter, so they’re not recommended here.

For the cheese sauce, use a good-quality white queso blanco dip that melts smoothly. If your queso is thick, warm it before adding so it spreads easily. Pepper jack adds a gentle heat and creamy melt; if you prefer mild, use Monterey Jack. This recipe is naturally gluten-free, but check your queso label for any thickeners.

• beef skirt steak: flank steak or sirloin, cut into strips
• white queso blanco dip: store-bought queso or a homemade white cheese sauce
• pepper jack cheese: Monterey Jack with a pinch of cayenne

Equipment

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