This Tex-Mex casserole layers seasoned ground beef, crushed tortilla chips, and melted cheese into a single baking dish that feeds four in under an hour. It uses pantry staples — taco seasoning, passata, shredded cheese — so there’s no special shopping trip. It reheats well, which makes it genuinely useful beyond the night you cook it.
Before you start
The one technique that matters here is draining the beef thoroughly before adding the seasoning and tomatoes. Excess fat sitting in the pan will make the tortilla chip layer soggy rather than just softened, and it dilutes the seasoning. Tilt the skillet and spoon off the pooled fat, or transfer the cooked beef briefly to a colander. The second thing worth doing is crushing the tortilla chips to a rough, uneven texture — not a fine crumb. Larger pieces hold their structure better under the beef mixture and give you some textural contrast in the finished bake.
Mistakes to avoid
- Skipping the simmer step: The five-minute simmer after adding the seasoning and tomatoes isn’t optional. It reduces excess liquid. Pour the mixture over the chips while it’s still watery and the base turns to mush in the oven.
- Spreading the chips too thin: A single sparse layer won’t support the beef mixture. Pack the chips in a reasonably even layer so every serving gets some of the base.
- Using pre-shredded cheese straight from a cold fridge: Cold, dense shredded cheese takes longer to melt evenly. Let it sit at room temperature for ten minutes before topping the casserole, and it’ll melt into an even layer rather than clumping.
- Overbaking: Once the cheese is golden and bubbling — usually at the 15-minute mark — pull it out. Another five minutes past that and the chip layer goes from pleasantly soft to stiff and dry around the edges.
- Cutting portions immediately out of the oven: Let the casserole rest for five minutes before serving. The beef layer firms up slightly and portions come out cleaner, which matters especially if you’re dividing it into containers for later.
Substitutions that actually work
- Passata vs. crushed tomatoes: Either works. Crushed tomatoes give a slightly chunkier texture; passata produces a smoother sauce. Both are fine — use whichever is in the cupboard.
- Tex-Mex cheese blend: Any combination of cheddar and Monterey Jack does the job. Straight cheddar works too, though it browns faster, so watch the oven closely after the 12-minute mark.
- Tortilla chips: Crushed pork rinds are a workable low-carb swap and hold up reasonably well under the beef layer. Skip the garnish of extra whole chips on top — not worth the extra dish.
- Ground beef fat content: 80/20 gives the most flavor but needs a good drain. 90/10 is leaner and skips some of the draining work, though the finished dish is slightly less rich.
Storage and reheating
Cooled leftovers keep in an airtight container in the fridge for up to four days. For longer storage, portion the casserole into individual servings before freezing — it thaws and reheats more evenly that way — and use within two months. To reheat from the fridge, cover the portion loosely with foil and warm it in a 350°F oven for 15 minutes, or microwave on medium power in 90-second intervals until the center hits 165°F. Reheating covered keeps the cheese from drying out. The chip layer softens further on reheating, which most people find perfectly acceptable; if you want some crunch back, scatter a few fresh crushed chips on top before serving.
Tex-Mex Beef Casserole with Tortilla Chips & Cheese
Equipment
Ingredients
- 2 cups Tex-Mex cheese - shredded, 8 oz / 225g
Instructions
- Preheat the oven to 400°F / 200°C (220°C fan-forced).
- Cook the ground beef in a large skillet over medium-high heat, breaking it into small pieces, until no pink remains (internal temperature of 160°F / 71°C). Tilt the skillet and spoon off the pooled fat, or transfer the beef briefly to a colander to drain.2 pounds ground beef (minced beef)
- Add the taco seasoning and passata. Stir together, and let simmer for 5 minutes.3 tablespoons taco seasoning, 1 can passata or crushed tomatoes (tomato puree with seeds removed)
- While the beef simmers, spread the crushed tortilla chips in an even layer across the bottom of a 9×13 inch (33x23cm) baking dish.3 cups tortilla chips
- Place the ground beef mixture over top of the crushed tortilla chips.2 pounds ground beef (minced beef), 1 can passata or crushed tomatoes (tomato puree with seeds removed), 3 tablespoons taco seasoning
- Top with the shredded cheese and diced jalapeños.2 cups Tex-Mex cheese, 3 medium jalapeños
- Bake for 15 to 20 minutes, or until the cheese is fully melted and golden brown on top.
Notes
Nutrition
Frequently asked questions
Can I assemble this casserole the night before and bake it the next day?
Yes, but keep the chip layer and the beef mixture separate until you’re ready to bake. If you layer them the night before, the chips absorb moisture from the beef and turn soft before the casserole even hits the oven. Store the cooked beef mixture in the fridge, then layer and bake fresh.
How do I know the ground beef is fully cooked before it goes in the oven?
Ground beef is safe to eat when it reaches an internal temperature of 160°F (71°C) and shows no pink. Cook it in the skillet until completely browned throughout — the oven step is about melting the cheese, not finishing the meat.
Can I double the recipe for a larger crowd or to stock the freezer?
Doubling works well. Use two 9×13 pans rather than one deeper dish — a thicker beef layer takes much longer to heat through evenly and can leave the chip base soggy. Bake both pans at the same time on separate oven racks.
What’s the best way to portion this for meal prep containers?
Cut the casserole into four equal portions while it’s still in the pan, then lift each piece out with a wide spatula. Portioning in the pan is easier than trying to divide it once it’s in a container, and the pieces hold together better when they’ve had the five-minute rest.
Can I use a different protein instead of ground beef?
Ground turkey or ground chicken both work here. Cook poultry to an internal temperature of 165°F (74°C) and make sure there’s no pink remaining before layering. The flavor is milder, so consider adding an extra half-tablespoon of taco seasoning to compensate.
The cheese browned too fast before the casserole was fully heated through — what went wrong?
This usually happens when the beef mixture goes into the pan cold from the fridge. Let the assembled casserole sit at room temperature for 10 minutes before it goes in the oven, so the base and beef layer have a head start on warming before the cheese takes color.
If you liked this one
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- Ultimate Cheesy Beef Bake
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- Savory Beef Sausage Rolls
