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.
Skillet Mexican Casserole (Easy Weeknight Tex-Mex)
Equipment
Ingredients
- 1 envelope taco seasoning mix
- 1 can tomato sauce - 8 oz / 225g
- 1 can Ro*Tel diced tomatoes and green chiles - 10 oz / 283g; or substitute 1 can diced tomatoes plus 2 tablespoons canned chopped green chiles
- 1 can condensed cream of mushroom soup - 10.5 oz / 298g
- 1 can Ranch Style Beans - 15 oz / 425g, seasoned pinto beans, drained; or substitute 1 can pinto beans drained and rinsed
- ¼ teaspoon non-stick cooking spray - vegetable oil
- 2 cups shredded Colby Jack cheese - 8 oz / 225g
Instructions
- Preheat the oven to 350°F / 175°C (180°C fan-forced).
- In a large skillet over medium-high heat, brown the ground beef with the chopped onion, breaking the meat into small pieces, until the beef is no longer pink and the onion is translucent — about 7–8 minutes. Drain any excess grease.1 lb ground beef (minced beef), 1 small white onion, 1 pinch salt
- Stir in the taco seasoning mix, tomato sauce, and Ro*Tel diced tomatoes. Cook for 2 minutes until combined.1 envelope taco seasoning mix, 1 can tomato sauce, 1 can Ro*Tel diced tomatoes and green chiles
- Add the cream of mushroom soup and Ranch Style Beans. Stir well and simmer on low for 10 minutes, stirring occasionally.1 can condensed cream of mushroom soup, 1 can Ranch Style Beans
- Spray a 12-inch oven-safe skillet with non-stick cooking spray. Arrange the flour tortillas in an overlapping layer across the bottom and slightly up the sides.1/4 teaspoon non-stick cooking spray, 4 small flour tortillas
- Spread half the meat mixture evenly over the tortillas. Scatter the crushed tortilla chips over the meat in an even layer, then sprinkle half the shredded cheese on top.2 cups tortilla chips, 2 cups shredded Colby Jack cheese
- Spread the remaining meat mixture over the cheese layer, then top with the remaining cheese.2 cups shredded Colby Jack cheese
- Cover the skillet tightly with aluminum foil and bake at 350°F / 175°C (180°C fan-forced) for 35 minutes. Remove the foil and bake for an additional 10 minutes until the cheese is bubbly and golden brown.
- Let the casserole rest for 5 minutes before slicing. Serve with extra tortilla chips on the side and top each portion with a dollop of sour cream before serving.2 cups tortilla chips, 1/4 cup sour cream
Notes
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