Oven-Baked Southwestern Beef and Pepper Casserole Recipe

If you’re craving a flavor-packed family dinner that’s easy to make, budget-friendly, and loaded with nutrients, this Oven-Baked Southwestern Beef and Pepper Casserole is the perfect choice. With ground beef, colorful bell peppers, sweet corn, and melted cheese, this hearty casserole brings all the bold Southwestern flavors straight to your table.

It’s a one-pan comfort food recipe that works for busy weeknights, meal prep, or even gatherings. Plus, it’s customizable with beans, rice, or extra spice depending on your taste.

Ingredients

1 lb ground beef (lean, for less grease)
1 medium onion, diced
3 bell peppers, chopped (use red, green, and yellow for extra color)
2 garlic cloves, minced
1 can (10 oz) diced tomatoes with green chilies (such as Rotel)
1 cup corn kernels (fresh, frozen, or canned/drained)
1/2 cup black beans (optional, rinsed and drained)
1 tsp ground cumin
1 tsp chili powder
1/2 tsp smoked paprika (optional, adds depth of flavor)
Salt and black pepper, to taste
1 cup shredded cheddar cheese (or Mexican cheese blend)
1/4 cup fresh cilantro or parsley, chopped (optional garnish)

Optional Toppings:

Crushed tortilla chips or seasoned breadcrumbs for crunch
Sour cream, sliced avocado, or guacamole for serving

Step-by-Step Instructions

Preheat the Oven
Set your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
Brown the Beef
In a large skillet, cook the ground beef and onion over medium heat until beef is fully browned and onion is tender. Drain excess grease.
Add Vegetables and Spices
Stir in garlic, chopped bell peppers, diced tomatoes (with juices), corn, and black beans if using. Add cumin, chili powder, smoked paprika, salt, and pepper. Cook for 5–7 minutes, until peppers soften slightly.
Assemble the Casserole
Transfer mixture to the baking dish. Top with shredded cheese. If you want extra crunch, sprinkle with tortilla chips or breadcrumbs.
Bake
Bake uncovered for 20–25 minutes, until cheese is melted, bubbly, and lightly golden.
Serve and Garnish
Remove from oven, let cool slightly, and garnish with cilantro or parsley. Serve with sour cream, avocado slices, or guacamole.

Recipe Variations

With Rice or Quinoa: Add 1–2 cups cooked rice or quinoa for a full one-dish meal.
Protein Swap: Use ground turkey or chicken instead of beef for a leaner option.
Spicy Kick: Add jalapeños, hot sauce, or chipotle powder for extra heat.
Cheesy Upgrade: Mix Monterey Jack or Pepper Jack with cheddar for a richer flavor.

Meal Prep & Storage

Make-Ahead: Prepare the casserole up to 24 hours in advance. Cover and refrigerate before baking.
Refrigerator: Store leftovers in an airtight container for up to 4 days. Reheat in the oven or microwave.
Freezer-Friendly: Freeze cooled portions in freezer-safe containers for up to 2 months. Thaw overnight and reheat before serving.

Why You’ll Love This Southwestern Beef Bake

Easy weeknight dinner recipe
Uses affordable, everyday ingredients
Kid-friendly and family-approved
Perfect for meal prep and freezer storage
Naturally gluten-free if using corn tortillas instead of breadcrumbs

Pro Tip for Maximum Flavor: Squeeze fresh lime juice over the casserole before serving for a zesty Southwestern touch.

This Southwestern Ground Beef and Pepper Bake is a go-to comfort food recipe that’s flavorful, filling, and incredibly versatile. Whether you’re serving it on its own, with rice, or alongside a salad, it’s sure to be a hit at your dinner table.