Cheesy taco bake layers seasoned ground beef, tortillas, beans, and melted cheese for a Tex-Mex family casserole everyone craves. Quick, protein-packed, and endlessly customizable with your favorite fresh toppings.
Preheat oven to 375°F and grease a 9x13-inch baking dish with olive oil.
Heat olive oil in a large skillet over medium-high heat. Sauté diced onion 2–3 minutes until softened.
Add ground beef; cook, breaking apart, until browned and no longer pink, about 6–7 minutes. Drain off excess fat.
Reduce heat to medium, stir in taco seasoning, tomato sauce, salt, and pepper. Simmer 2–3 minutes until thickened.
Layer 3 tortillas across the bottom of the baking dish. Top with half the beef mixture, half the black beans, and half the cheese.
Repeat layers with remaining tortillas, beef, beans, and cheese.
Cover loosely with foil and bake 15 minutes. Remove foil and bake 7–10 more minutes, until cheese is bubbly and lightly golden.
Let casserole rest 10 minutes before slicing. Serve warm, garnished with fresh toppings if desired.