Slow Cooker Cowboy Casserole
This hearty dish layers seasoned ground beef, baked beans, corn, and diced tomatoes under a blanket of melted cheddar cheese, all slow-cooked together until every ingredient melds into a thick, deeply satisfying casserole.
Equipment
- 6-quart slow cooker - minimum size recommended for this recipe
- Large skillet or cast iron pan - for browning the beef
- Wooden spoon or heat-safe spatula
- Sharp chef's knife
- Cutting board
- Can opener
- Measuring spoons
- Measuring cups
- Colander or fine-mesh strainer - for draining beans and corn
Ingredients
- 1.5 lbs lean ground beef - 680g, 80/20 blend works best
- 1 medium yellow onion - diced
- 3 cloves garlic - minced
- 1 can diced tomatoes - 28 oz / 794g, undrained
- 1 can baked beans - 15 oz / 425g, undrained
- 1 can kidney beans - 15 oz / 425g, drained and rinsed
- 1 can whole kernel corn - 15 oz / 425g, drained
- 2 tablespoons Worcestershire sauce
- 1 tablespoon tomato paste
- 1 teaspoon smoked paprika
- 1 teaspoon chili powder
- 0.5 teaspoon ground cumin
- 0.5 teaspoon garlic powder
- 0.5 teaspoon onion powder
- salt and black pepper - to taste
- 1.5 cups sharp cheddar cheese - 170g, shredded, divided
- 2 tablespoons olive oil - for browning the beef
For Serving (Optional)
- Sour cream - for serving
- Green onions - sliced, for serving
- Pickled jalapeños - for serving
- Fresh cilantro - chopped, for serving
Instructions
- Prep the vegetables: Dice the onion, mince the garlic, drain and rinse the kidney beans, and drain the corn. Keep the baked beans and diced tomatoes undrained.
- Brown the beef: Heat olive oil in a large skillet over medium-high heat. Cook the onion for 2-3 minutes until translucent, then add garlic for 30 seconds until fragrant.
- Cook the ground beef: Add beef to the skillet, breaking into crumbles. Cook for 6-8 minutes until browned. Drain excess fat, then stir in tomato paste and cook for 1 more minute.
- Season the beef: Add smoked paprika, chili powder, cumin, garlic powder, onion powder, Worcestershire sauce, salt, and pepper. Stir until the beef is evenly coated.
- Layer the slow cooker: Transfer the beef to a 6-quart slow cooker sprayed with non-stick spray. Top with undrained diced tomatoes, undrained baked beans, drained kidney beans, and drained corn. Stir gently to combine.
- Slow cook: Cover and cook on LOW for 6-7 hours or on HIGH for 3-4 hours. The low and slow method is recommended for the best flavor development.
- Add cheese to the base: 30 minutes before the cooking time ends, stir in 1/2 cup of shredded cheddar cheese until it melts into the sauce. Cover and cook for the remaining time.
- Top with cheese: Once cooking is complete, sprinkle the remaining 1 cup of shredded cheddar cheese evenly over the top. Cover and let sit for 5-10 minutes to melt.
- Serve: Ladle into bowls and serve hot with sour cream, sliced green onions, pickled jalapeños, or fresh cilantro as desired.
Notes
- Browning is essential: Always brown the ground beef first. Skipping this step results in a greasy, grey texture and less flavor. The Maillard reaction creates the deep savory taste that makes this casserole special.
- Don't skip the tomato paste: That one tablespoon, cooked briefly in the pan, adds a concentrated richness that rounds out the whole dish. It's a small step with a big payoff.
- Use undrained baked beans: The sauce from the baked beans is a major flavor contributor. Draining them removes the sweet, smoky depth you want in this casserole.
- Shred your own cheese: Pre-shredded cheese contains anti-caking agents that prevent it from melting as smoothly. Buying a block of sharp cheddar and shredding it yourself makes a noticeable difference in that melty, gooey cheese layer.
- Keep the lid closed: Every time you lift the slow cooker lid, you lose heat and moisture. Only lift it when the recipe specifically calls for it, about 30 minutes before the end.
- Two-stage cheese method: Stirring some cheese into the casserole 30 minutes before the end creates a creamy, integrated base. Topping with cheese at the very end gives you that satisfying melty layer on top.
- Spicy variation: For a spicier casserole, add 1-2 diced jalapeños with the onion and increase the chili powder to 2 teaspoons. Add a few dashes of hot sauce just before serving for extra heat.
- Make it ahead: You can brown the beef and store it with the seasonings in the refrigerator the night before, then simply load everything into the slow cooker in the morning for a true set-it-and-forget-it meal.
- Storage: Store leftovers in an airtight container in the refrigerator for up to 4 days. The flavors actually deepen after a day, making next-day portions even more delicious.
- Freezing instructions: This casserole freezes beautifully for up to 3 months. Thaw in the refrigerator overnight, then reheat on the stovetop or in the microwave with a splash of beef broth to loosen the texture.