Slow-Cooker Oaxaca Queso Jalapeño Beef Barbacoa

This slow-cooker beef barbacoa is the ultimate dump-and-forget dinner. Cubes of beef chuck simmer all day with fire-roasted tomatoes, pickled jalapeños, and a double layer of Oaxaca and Mexican four-cheese blend.

The result is tender, shredded beef in a zesty, cheesy sauce that needs nothing more than a bowl of rice or warm tortillas to become a complete meal. Set it in the morning, walk away, and come back to a bubbling pot of pure comfort.

Barbacoa is traditionally a slow-cooked meat dish, and the slow cooker is the perfect modern vehicle for it. Here, beef chuck cubes are layered with pantry staples — fire-roasted diced tomatoes with green chiles, sliced pickled jalapeños, and a generous mound of shredded Oaxaca and Mexican four-cheese blend.

The slow cooker does all the work: the beef becomes fall-apart tender, the cheese melts into a blistered, golden blanket, and the tomatoes and jalapeños form a bright, tangy sauce. Serve it over Spanish rice, pile it into tacos, or spoon it over nachos for a crowd-pleasing meal.

Ingredients

Why this recipe works

The slow cooker creates the ideal environment for tough, collagen-rich beef chuck to break down into tender, shreddable strands. Cooking on LOW for 8 hours allows the connective tissue to melt slowly, leaving you with meat that falls apart at the touch of a fork.

The low, moist heat also keeps the beef juicy and infuses it with the flavors of the tomatoes and jalapeños as they meld into a rich sauce.

Layering the ingredients in the order shown — beef first, then tomatoes, then cheese on top — ensures that the cheese doesn't scorch on the bottom and instead melts into a gooey, blistered topping.

The fire-roasted tomatoes add a smoky depth, while the pickled jalapeños contribute acidity and a gentle heat. This hands-off approach means you get a complex, layered dish with minimal effort and maximum reward.

Notes and substitutions

Beef chuck cubes are ideal because they have enough fat and connective tissue to stay moist during the long cooking time. If you can't find pre-cubed chuck, ask your butcher to cut a chuck roast into 2-inch pieces. The pickled jalapeños are not optional — they add a briny tang that cuts through the richness of the beef and cheese. Use the jarred kind for the best texture and flavor.

Oaxaca cheese is a Mexican string cheese that melts beautifully, giving the dish its signature stretch. The Mexican four-cheese blend typically includes cheddar, Monterey Jack, queso quesadilla, and asadero — all excellent melters. If you can't find Oaxaca, substitute mozzarella or Monterey Jack. The slow cooker should be at least 6 quarts to accommodate all the ingredients comfortably.

• Oaxaca cheese: Mozzarella or Monterey Jack cheese
• Mexican four-cheese blend: Any shredded melting cheese like cheddar or Colby Jack
• Fire-roasted diced tomatoes with green chiles: Regular diced tomatoes plus a small can of chopped green chiles
• Beef chuck cubes: Beef stew meat or beef brisket

Equipment

• 6-quart slow cooker
• cutting board
• chef's knife
• serving spoon
• measuring cups
• measuring spoons