Name: Mexican Ground Beef Casserole Recipe
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Cuisine: Mexican
Ingredients: 4 cups cooked cauliflower rice (or cooked white or brown rice); 1 10-oz can diced tomatoes with green chilies (drained very well); 1 tbsp avocado oil (plus additional 1 tbsp for sautéing); 2 large bell peppers (diced); 1/2 large onion (diced); 1/2 tsp sea salt (to taste); 1/4 tsp black pepper (to taste); 2 lb ground beef; 1/2 cup water; 1/4 cup taco seasoning; 1 cup sour cream; 2 cups Mexican cheese blend (shredded); Tomatoes (diced, for garnish); Jalapenos (sliced, for garnish); Avocados (sliced, for garnish); Fresh cilantro (chopped, for garnish)

Jump to Recipe· 4.1 from 41 reviews

If you are craving a dish that bursts with bold flavors, textures, and colors all layered in one irresistible bake, you absolutely need to try this Mexican Ground Beef Casserole Recipe. It’s a heartwarming combination of seasoned ground beef, tender sautéed vegetables, creamy sour cream, and melty Mexican cheese baked atop a bed of vibrant cauliflower rice mixed with zesty diced tomatoes and green chilies. This casserole is comfort food elevated with a fresh southwestern twist, perfect for feeding a crowd or savoring as leftovers. Once you taste it, you’ll find it’s a new go-to recipe with a perfect balance of savory, spicy, and creamy goodness that simply melts in your mouth.

Ingredients You’ll Need

The image shows several ingredients arranged on a white marbled surface. In the center, there is a white plate holding two compact squares of raw ground beef with a reddish-pink color, showing a textured and slightly uneven surface. Above and to the right, there is a small white bowl filled with a reddish-brown taco seasoning powder that looks finely ground. Below this, a clear glass bowl contains a mix of shredded yellow and white Mexican cheese blend, the strands thin and soft. At the bottom left, a clear measuring cup holds water, clear and shiny. The composition is clean and bright, with natural lighting highlighting the colors and textures of the ingredients, photo taken with an iphone --ar 4:5 --v 7

Gathering the ingredients for this recipe is a breeze because each one offers something essential to the flavor, texture, or color of the final dish. From the hearty ground beef to the fresh bell peppers and the cheesy topping, every component plays its starring role in creating that classic Mexican-inspired comfort food experience.

Cooked cauliflower rice (4 cups): A lighter, low-carb base that soaks up flavors beautifully, though you can swap in white or brown rice for a heartier touch.
Diced tomatoes with green chilies (1 10-oz can, drained well): Adds a juicy, slightly spicy brightness that livens up the casserole.
Avocado oil (1 tbsp): A healthy, neutral oil that helps sauté veggies without overpowering the flavors.
Bell peppers (2 large, diced): Bring sweetness and vibrant color while softening to a delightful texture.
Onion (1/2 large, diced): Adds depth and a subtle natural sweetness when caramelized lightly.
Sea salt (1/2 tsp): Enhances all the flavors, used to taste.
Black pepper (1/4 tsp): Adds just a hint of warmth and spice.
Sour cream (1 cup): Creamy element that balances the spices and brings richness to the layers.
Ground beef (2 lb): The savory protein star that anchors the casserole.
Water (1/2 cup): Used to help the taco seasoning blend perfectly into the beef.
Taco seasoning (1/4 cup): The magic spice mix that delivers classic Mexican flavors.
Mexican cheese blend (2 cups, shredded): Melts beautifully on top, offering a gooey, cheesy finish.
Optional garnishes (tomatoes, jalapenos, avocados, fresh cilantro): Fresh toppings to customize your serving and add vibrant pops of flavor.

How to Make Mexican Ground Beef Casserole Recipe

Step 1: Prepare Your Rice Base

The first foundation of this dish is either cauliflower rice or your choice of cooked white or brown rice. I love cauliflower rice here because it keeps the casserole feeling light and adds a gentle texture that contrasts perfectly with the meat and cheese. Once cooked, mix in the drained diced tomatoes with green chilies to infuse the rice with tangy and mildly spicy flavor. Press this layers to the bottom of your casserole dish to create a moist, colorful bed for the rest of the ingredients.

Step 2: Sauté Your Veggies

Give your skillet a quick wipe and heat a tablespoon of avocado oil to medium. Add the diced bell peppers and onions and let them gently soften and brown over about 10 to 15 minutes. This step is important because it draws out their natural sweetness and adds a lovely caramelized note that complements the savory beef. Season with a little sea salt and black pepper to enhance their flavors before spreading them evenly over your rice layer.

Step 3: Add the Cream Layer

Spread the entire cup of sour cream evenly over the sautéed vegetables with the back of a spatula. This creamy layer acts like a delicious bridge between the veggies and the beef, adding richness and a smooth texture that melts into every bite once baked.

Step 4: Cook the Ground Beef

Turn the heat up to medium-high and add the ground beef to your skillet. Break it apart with a spatula, letting it brown thoroughly — this caramelization brings the most flavor out of the meat. After about 10 minutes, pour in the water and taco seasoning, stirring to combine. Bring the mixture to a gentle boil, then reduce heat and simmer so the excess moisture evaporates, leaving the beef perfectly seasoned and thickened. It’s this savory layer that brings bold, authentic Mexican spice to the casserole.

Step 5: Assemble and Bake

Spread the seasoned beef mixture evenly on top of the sour cream layer in your casserole dish. Cover the entire surface with the shredded Mexican cheese blend, which will melt down in a golden, bubbly topping. Bake in a 400 degree Fahrenheit oven for 10 to 15 minutes or until the casserole is hot throughout and the cheese is beautifully melted and slightly browned.

How to Serve Mexican Ground Beef Casserole Recipe

A close-up image of a layered casserole being lifted with a black spatula, showing melted yellow and white cheese stretching in strings. The top layer is golden brown melted cheese with green herb bits sprinkled on top. Below the cheese, there is a thick layer of cooked ground meat mixed with sauce and diced tomatoes visible in the middle. The bottom layer looks like cooked rice or grains. The casserole is held inside a clear rectangular glass baking dish on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

After baking, your Mexican Ground Beef Casserole Recipe is a perfect canvas for fresh garnishes. Bright diced tomatoes add juiciness; sliced jalapenos bring a spicy kick; ripe avocado slices offer creamy coolness; and fresh cilantro lends a burst of herbal freshness. These toppings bring balance by adding fresh textures and flavors that you can customize to your liking.

Side Dishes

This casserole is substantial on its own but plays wonderfully with simple side dishes like a crisp green salad with citrus dressing or a bowl of refried beans for additional protein. A side of corn tortillas or warm chips can add crunch and allow for fun, familial sharing. These sides keep the meal well-rounded and satisfying without overshadowing the star casserole.

Creative Ways to Present

If you want to impress guests or just make dinner feel extra special, try serving individual portions of the casserole in mini ramekins for a charming personalized touch. Alternatively, you can turn leftovers into delicious stuffed bell peppers or layered nachos topped with fresh ingredients for a fun, new spin on the classic Mexican Ground Beef Casserole Recipe.

Make Ahead and Storage

Storing Leftovers

If you have leftovers, store them in an airtight container in the refrigerator for up to 4 days. The layered flavors actually deepen overnight, making for even better taste the next day. Just keep the fresh garnishes separate until serving to keep them crisp.

Freezing

This casserole freezes well, which makes it a fantastic meal prep option. Place portions in freezer-safe containers or wrap tightly in foil and freeze for up to 3 months. Thaw overnight in the fridge before reheating for best texture and flavor.

Reheating

Reheat your Mexican Ground Beef Casserole Recipe gently in the oven at 350 degrees Fahrenheit for about 15-20 minutes or until warmed through. You can also microwave individual servings covered loosely with a microwave-safe lid, heating in 1-2 minute increments for even warmth without drying it out.

FAQs

Can I use ground turkey or chicken instead of beef?

Absolutely! Ground turkey or chicken are great lean alternatives that work perfectly with the taco seasoning and other layers. Just cook them thoroughly and adjust seasoning to taste as they can be milder than beef.

Can I make this casserole vegetarian?

Yes! Swap out the ground beef for sautéed mushrooms, lentils, or a plant-based meat substitute to keep it hearty and flavorful while staying vegetarian-friendly. The spices and cheese will carry the dish beautifully.

Is cauliflower rice necessary or can I just use regular rice?

You can definitely use cooked white or brown rice instead of cauliflower rice. Cauliflower rice keeps the dish lighter and lower in carbs, but traditional rice will add a comforting, chewy texture and soak up the spices wonderfully.

How spicy is this casserole?

The heat level is mild to moderate thanks to the diced tomatoes with green chilies and taco seasoning. If you prefer more heat, add extra jalapenos or a pinch of cayenne pepper to the beef mixture or as a garnish.

Can I prepare parts of this recipe in advance?

Yes, you can cook the rice and sauté the veggies a day ahead and keep them refrigerated separately. You can also brown the beef in advance. Assemble and bake right before serving for maximum freshness and convenience.

Final Thoughts

This Mexican Ground Beef Casserole Recipe is one of those gems that brings everyone together around the table. It’s comforting, satisfying, and packed with layers of flavor and texture that guarantee smiles with every bite. Whether you’re cooking for a family dinner or meal prepping for the week, give this recipe a try—you won’t regret it. Trust me, once you taste it, it’ll become one of your favorite go-to casseroles too!