
My trusty Mexican Fiesta Bake has been my crowd-pleasing standby for family dinners and potlucks forever. When you mix beefy goodness, gooey cheese, and crunchy chips together, folks grab seconds before I've even put the dish down on the table.
I whipped this up during an unexpected game night when friends dropped by. With zero time to shop and just whatever was in my cabinets, this dish came together out of desperation. Now my buddies text me ahead of time asking if I'll make "that casserole thing" when they visit.
What You'll Need
- Ground beef: Forms your meaty foundation. Grab 80/20 for the tastiest result
- Black beans: Pack in fiber and substance. Give them a good rinse to wash away extra salt
- Corn kernels: Add bursts of sweetness throughout. Grab fresh ears in summertime
- Diced tomatoes with green chilies: Save chopping time while adding zippy taste
- Cream cheese: Delivers that silky smooth texture. Skip the low-fat version
- Sour cream: Brings a tangy kick to balance richness. Let it sit out a bit before using
- Cheddar cheese: Creates that drool-worthy brown top. Grate it yourself for better melting
- Tortilla chips: Supply the crunchy foundation. Go for sturdy restaurant-style ones
- Taco seasoning: Gives everything that Mexican flair. Try homemade to cut salt
- Green onions for garnish: Finish with color and fresh zip
How to Make It
- Cook the Meat:
- Brown your beef in a big pan over medium heat until there's no pink left, roughly 7-8 minutes. Break it up small as it cooks for better texture. Pour off the extra grease so your dish isn't soggy.
- Mix the Main Stuff:
- Put your rinsed beans, corn, tomatoes with chilies, and taco mix into the cooked meat. Mix it all up and let it bubble for 5 minutes so flavors can get friendly and extra water cooks away. This step packs in the taste.
- Whip the Creamy Part:
- Grab another bowl and mix your soft cream cheese with sour cream until it's completely smooth. Take about 2 minutes with your spatula or mixer. The smoother you get it, the easier it'll spread later.
- Start Layering:
- Grease a 9x13 pan, then cover the bottom with half your chips, breaking some to fill gaps. Top with half your meat mix, then drop spoonfuls of your cream blend and gently spread it out. Sprinkle half your cheddar on top.
- Finish the Layers:
- Do it all again - more chips, the rest of the meat, more cream stuff, and finish with your remaining cheese. Make sure to spread everything all the way to the edges so every bite tastes good.
- Get it Hot:
- Cover with foil and stick it in a 350°F oven for 25 minutes. Then pull off the foil and cook another 10-15 minutes until cheese bubbles and gets those tasty brown spots. Let it sit for 5 minutes before digging in so it firms up a bit.

What gets me every time is how the bottom layer of chips turns slightly soft as it soaks up all those tasty juices while keeping just enough bite. It brings back memories of my grandma making Sunday morning chilaquiles, but beefed up into a heartier dinner version.
Switch It Up
This dish works with whatever you've got on hand. Swap the beef for ground turkey or chicken if you want something lighter. Skip meat completely and throw in extra beans for a veggie version. Try using pepper jack instead of cheddar for extra kick, or dump in some green enchilada sauce with the beef to add amazing flavor without much work.
What to Serve With It
Pair this rich dish with a basic green salad with lime dressing to cut through all that goodness. Add some Mexican rice on the side when you need to feed lots of hungry folks. Wash it all down with an ice-cold Mexican beer or a big pitcher of fresh limeade if you don't want alcohol.
Keeping Leftovers
Your casserole will stay good in the fridge for about 4 days in a sealed container. When you want to warm it up, cover with foil and stick it in a 325°F oven for around 20 minutes until hot through the middle. The microwave works too but might make your chips soggy. You can freeze single portions up to 3 months; the chips won't be as crisp but will still taste great.

Whenever you need something filling and tasty that'll make everyone happy, this casserole won't let you down.
Frequently Asked Questions
- → Can I put this casserole together in advance?
Definitely! You can assemble the layers up to a day ahead. Just don’t bake it yet. Cover it well and keep it in the fridge. When it’s time to cook, pop it in the oven and add around 10 extra minutes to the baking time to account for the chilled temperature.
- → What can I use instead of ground beef?
Ground turkey, chicken, or plant-based crumbles are great swaps. Shredded chicken works too, or skip the meat altogether and add more beans and veggies for a vegetarian twist.
- → How can I keep tortilla chips crunchy?
To keep the chips crispy, try toasting them in the oven for a few minutes before layering. Also, let the beef mixture simmer to reduce extra liquid that could make the chips soggy.
- → What should I serve alongside this dish?
This filling meal goes well with a crisp green salad, a side of Mexican rice, or roasted veggies. Toppings like avocado slices, pico de gallo, or extra sour cream are also great additions.
- → Can I freeze leftover casserole?
Yes, you can freeze portions for up to three months. Use airtight containers and thaw in the fridge before reheating. The chips may lose a bit of crunch, but the flavors stay great.
- → How spicy is this casserole, and can I adjust it?
It’s mildly spicy thanks to the green chilies and taco seasoning. For a milder version, use plain diced tomatoes and mild seasoning. To amp up the heat, add chopped jalapeños or a pinch of chili powder.