This is a layered, oven-baked casserole built on flour tortillas, taco-seasoned ground beef, white beans, cream of mushroom soup, crushed tortilla chips, and Colby Jack cheese. It comes together in one skillet before going into the oven, and the whole thing — prep included — is done in 50 minutes. That combination of pantry staples and minimal cleanup is the honest reason to make it on a weeknight.
What makes this version work
Two things matter here. First, the cream of mushroom soup. It sounds out of place in a Tex-Mex dish, but it does a specific job: it binds the meat mixture so the layers hold together when you cut and serve, and it keeps the filling from drying out during the 45-minute total bake. Don’t skip it or substitute broth — you’ll lose that cohesion. Second, the layering order. Tortillas on the bottom create a firm base that absorbs just enough moisture to stay intact without going soggy. Crushed chips go in the middle layer, not on top, so they soften slightly into the filling rather than burning. The cheese on top gets the full heat of the uncovered final 10 minutes, which is what gives you the bubbly, browned surface. Both steps are quick, but getting them in the right sequence is what separates a clean slice from a collapsed mess.
Shopping notes
- Neapolitan or pasta sauce (tomato sauce): This is a standard tomato-based pasta sauce — use any plain variety from the shelf. In North America it’s labeled tomato sauce; in the Southern Hemisphere it’s often called Neapolitan or pasta sauce. Either works.
- Passata or crushed tomatoes: Passata is smooth, strained tomatoes with seeds removed. Crushed tomatoes are a direct substitute. Avoid diced tomatoes here — too much liquid and uneven texture.
- Ranch-style white beans: These are canned white beans seasoned with mild chili and garlic. If you can only find plain canned white beans, add a pinch of garlic powder and a pinch of chili powder to compensate.
- Colby Jack cheese: A pre-shredded Mexican blend or straight cheddar melts and browns just as well — skip the fancy block and grater on a weeknight.
If something goes sideways
- The bottom tortillas are soggy: This usually means the meat mixture was too wet before layering. Let it simmer the full 10 minutes uncovered so excess liquid cooks off before you assemble.
- The cheese isn’t browning in the final 10 minutes: Oven temperatures vary. If the surface still looks pale, switch to the broiler for 2–3 minutes — watch it closely, it goes from pale to burnt fast.
- The casserole is watery when you cut into it: The foil traps steam. If your filling looked thin before baking, leave the foil off for the last 15 minutes instead of 10 to drive off more moisture.
- The meat isn’t cooked through after browning: Ground beef must reach an internal temperature of 160°F (71°C). If it’s still pink after browning with the onion, keep it on the heat — don’t rely on the oven bake to finish raw meat.
- The tortilla chips on the middle layer are completely mushy: They’re meant to soften slightly, but if they’ve dissolved entirely, the chips were probably crushed too fine. Leave them in larger pieces — roughly thumbnail-sized — so they keep some structure.
Storage and reheating
Leftovers keep well in the fridge for up to 3 days in an airtight container. Reheat individual portions in the microwave for 2–3 minutes, or cover the skillet with foil and warm it in a 325°F (165°C) oven for about 15 minutes until heated through. For freezing, let the casserole cool completely, then wrap tightly and freeze for up to 2 months. Thaw overnight in the fridge before reheating — going straight from frozen to oven makes the tortilla base rubbery. The texture after freezing is slightly softer than fresh, but the flavor holds up fine. Skip the sour cream garnish before storing — add it fresh when serving, not worth the extra dish.
Filling Skillet Mexican Casserole
Ingredients
1 pound ground beef (minced beef)
1 small white onion - chopped
1 pinch salt
1 pinch ground black pepper- 1 envelope taco seasoning mix
1 can Neapolitan Sauce or Pasta sauce Southern Hemisphere (Tomato Sauce in North America)
1 can passata or crushed tomatoes (tomato puree with seeds removed)
1 can cream of mushroom soup
1 can white beans - ranch style
1 bag tortilla chips
4 small flour tortillas
3 sprays vegetable oil
1 package Colby jack cheese
Instructions
- Brown the ground beef together with the onion until the meat is no longer pink and the onion is translucent. Add the envelope of taco seasoning mix, tomato sauce and Rotel and heat through. Stir in the cream of mushroom soup and Ranch Style Beans. Allow to simmer for about 10 minutes.
- Spray a large 12-inch skillet bottom with cooking spray and line the bottom with the flour tortillas. Layer half of the hamburger mixture on the tortillas and top with crushed tortilla chips until completely covered. Sprinkle half the cheese over the top of the tortilla chips. Add another layer of the meat mixture and top with remaining cheese. Bake covered with foil in the oven at 350 degrees for 35 minutes. Uncover and bake an additional ten minutes until cheese is bubbly. Serve with tortilla chips.
- Add a dollop of sour cream to top everything off.
Nutrition
FAQ
Can I assemble this casserole ahead of time and bake it later?
Yes, you can assemble it up to 24 hours ahead and refrigerate it unbaked. Add 5–10 minutes to the covered bake time since it’s going in cold.
Can I use corn tortillas instead of flour tortillas for the base?
Flour tortillas work better here because they’re more pliable and hold together under the weight of the filling. Corn tortillas tend to crack and crumble when used as a base layer, which makes serving messy.
What can I use instead of cream of mushroom soup?
Cream of chicken soup is the closest swap and won’t change the flavor profile much. Cream of celery also works. A plain béchamel sauce (about 1 cup) is a from-scratch option if you want to avoid canned soup entirely.
How do I know when the ground beef is fully cooked before layering?
It should show no pink and register 160°F (71°C) on an instant-read thermometer. Don’t skip checking — the oven bake is for melting cheese and setting layers, not for cooking raw meat through.
Can I make this with ground turkey instead of ground beef?
Ground turkey works as a direct substitute by weight. Cook it to 165°F (74°C) internal temperature — it needs slightly longer in the skillet than beef and benefits from a small drizzle of oil since it’s leaner.
My skillet isn’t oven-safe — can I transfer to a baking dish?
Yes, a 9×13-inch baking dish works well. Assemble the layers directly in the greased baking dish instead of the skillet, then bake as directed — the times stay the same.
Try these next
- Spicy Beef Stuffed Peppers
- Ultimate Cheesy Beef Bake
- Hearty Beef Cauliflower Bake
- Hearty Beef Mushroom Stroganoff
Yummy