This keto taco skillet casserole started out as a simple skillet meal. One night I slid it into the oven with a layer of cheese on top, and I never went back. The cheese melts into a bubbly, golden layer, and the taco filling underneath gets even more flavorful.

It’s low carb, high protein, and ready in under 40 minutes. Kids like it because it tastes like tacos. Grown ups like it because it’s filling and easy to clean up.

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Why This Keto Taco Casserole Works

Riced cauliflower takes the place of rice or tortillas. It soaks up the salsa and taco seasoning, so you barely notice it’s there. It also stretches the beef and adds a serving of vegetables without anyone complaining.

Salsa does double duty. It adds moisture and flavor at the same time, so you don’t need to make a separate sauce. A splash of beef broth is optional, but it helps if your salsa is on the thick side.

Baking it at the end is what turns a basic skillet dinner into a casserole. Twenty minutes in the oven melts the cheese and lets the flavors settle together.

Ingredients and Easy Swaps

• Ground beef (1½ pounds). 80/20 gives the most flavor. Drain some of the fat if you like. Ground turkey works too.
• Taco seasoning (2 to 3 tablespoons). Check the label if you’re strict keto, since some packets have added sugar or starch. Homemade seasoning is an easy fix.
• Salsa (1 cup). Pick one with no added sugar. Mild for kids, hot if you like heat.
• Riced cauliflower (1 cup). Fresh or frozen both work. If frozen, you can add it straight from the bag.
• Shredded Mexican cheese blend (1½ cups). Cheddar, Monterey Jack, or pepper jack are all good swaps.
• Beef broth (¼ cup, optional). Adds moisture if the filling looks dry.
• Toppings. Sliced green onions and sour cream are the classics.

Quick Homemade Taco Seasoning

If you want full control over carbs and salt, mix your own. For this recipe, stir together 1 tablespoon chili powder, 1 teaspoon ground cumin, 1 teaspoon paprika, ½ teaspoon garlic powder, ½ teaspoon onion powder, ½ teaspoon dried oregano, and ¾ teaspoon salt. Add a pinch of cayenne if you like heat. Make a big batch and keep it in a jar so it’s ready for the next taco night.

How to Make It at a Glance

1. Heat the oven to 375°F and grease a 9×13 inch baking dish.
2. Brown the ground beef in a large skillet until it reaches 160°F and no pink remains.
3. Stir in the taco seasoning, salsa, riced cauliflower, and broth if using. Simmer 2 to 3 minutes.
4. Spread the mixture in the baking dish and top with the cheese.
5. Bake for 20 minutes until the cheese is melted and bubbly. Add toppings and serve.

If your skillet is oven safe, you can skip the baking dish. Just top the filling with cheese right in the skillet and slide it into the oven. One less dish to wash.

Common Mistakes to Avoid

• A watery casserole. Thin salsa or frozen cauliflower can add extra liquid. Simmer the filling a few extra minutes until it thickens before baking.
• Skipping the taste test. Taste the filling before it goes in the oven. Add more taco seasoning if it needs it.
• Not draining fatty beef. With higher fat beef, spoon off some grease so the casserole isn’t oily.
• Using pre-sweetened salsa. Some jars have sugar. Read the label if you’re keeping carbs low.

Variations

• Add peppers and onions: Sauté a diced bell pepper and half an onion with the beef.
• Make it spicier: Stir in a chopped jalapeño or a can of green chiles.
• Use chicken: Swap the beef for shredded cooked chicken. Cook until hot, about 165°F.
• Not keto? Stir in a can of rinsed black beans or a cup of cooked rice.

What to Serve With It

Serve it with a crisp side salad, sliced avocado, or a simple cabbage slaw with lime. For a low carb taco night feel, put out bowls of toppings like diced tomatoes, shredded lettuce, sliced olives, pickled jalapeños, and guacamole. Anyone not eating low carb can scoop theirs into tortillas or onto tortilla chips.

Make Ahead, Storage, and Reheating

Make ahead: Cook the filling, spread it in the dish, and top with cheese. Cover and refrigerate for up to 24 hours. Bake a few minutes longer since it starts cold.

Storage: Keep leftovers covered in the fridge for 3 to 4 days. It’s great for packed lunches.

Freezing: Freeze portions for up to 3 months. Thaw overnight in the fridge before reheating.

Reheating: Microwave single servings for 1 to 2 minutes, or reheat the dish covered with foil at 350°F until hot.

FAQ

Is this casserole really keto?
Yes, as long as you use a taco seasoning and salsa without added sugar or starch. The cauliflower, beef, and cheese are all low carb.

Can I make it in a smaller dish?
Yes. An 8×8 inch dish works but the layer will be deeper. Bake a few extra minutes so it’s hot in the center.

Can I use regular rice instead of cauliflower?
Yes. Use about 1 cup of cooked rice. It won’t be keto, but it’s still a quick, tasty dinner.

How many does it serve?
About 4 hearty servings. With a big salad on the side, it can stretch to 5 or 6.