Slow-Cooker Oaxaca Queso Fajita Skirt Steak

This slow-cooker Oaxaca queso fajita skirt steak is the ultimate set-it-and-forget-it dinner. Tender strips of skirt steak, colorful bell peppers, and red onions simmer low and slow in a rich blend of melted Oaxaca and Mexican cheeses.

The result is a juicy, cheesy, flavor-packed meal that tastes like it took hours of hands-on work—but the slow cooker does all the heavy lifting. Serve it over Spanish rice for a complete, satisfying dinner that the whole family will love.

Fajita night just got easier. This recipe layers raw skirt steak strips with sliced bell peppers, red onion, lime juice, and a generous amount of shredded Oaxaca and Mexican four-cheese blend. Everything cooks together in the slow cooker until the steak is tender and the cheese is melted into a luscious, savory sauce.

The hands-off method means you can prep in the morning and come home to a bubbling, aromatic dinner ready to serve. Pair it with warm tortillas or rice for a meal that's both comforting and impressive.

Ingredients

Why this recipe works

The slow cooker does the work: low, steady heat breaks down the connective tissue in skirt steak, turning a tough cut into fork-tender strips.

The cheese melts into a creamy, rich sauce that coats every bite, while the peppers and onions soften and release their natural sweetness. This method requires no babysitting—just dump the ingredients in and let time work its magic.

Layering the ingredients in the order given—meat first, then vegetables, then cheese—ensures even cooking and flavor distribution. The lime juice brightens the richness, and the seasoning penetrates the meat as it simmers. The result is a deeply savory, slightly tangy, and undeniably cheesy dish that captures the essence of fajitas in a comforting, slow-cooked form.

Notes and substitutions

Skirt steak is the star here, prized for its beefy flavor. If unavailable, flank steak or sirloin, sliced thin, work well. The fajita seasoning can be store-bought or a homemade blend of chili powder, cumin, and smoked paprika.

Oaxaca cheese is a Mexican string cheese with excellent melting properties; if you can't find it, mozzarella or Monterey Jack are great stand-ins.

The Mexican four-cheese blend typically includes cheddar, Monterey Jack, queso quesadilla, and asadero—all melt beautifully. For the best texture, shred cheese from a block rather than buying pre-shredded, which contains anti-caking agents that can hinder melting. The beef broth adds moisture and depth; use low-sodium if you prefer to control saltiness.

• skirt steak: flank steak or sirloin, sliced thin
• Oaxaca cheese: mozzarella or Monterey Jack, shredded
• Mexican four-cheese blend: any shredded melting cheese like cheddar or pepper jack
• fajita seasoning: homemade mix: 1 tbsp chili powder, 1 tsp cumin, 1 tsp smoked paprika, 1/2 tsp garlic powder, 1/2 tsp onion powder

Equipment

• Slow cooker (6-quart)
• Cutting board
• Chef's knife
• Measuring cups and spoons
• Tongs
• Serving spoon