Keto Taco Casserole Cheesy

Featured in: Quick Dude Dinners

This hearty low-carb casserole features seasoned ground beef layered with cauliflower rice and topped with melted cheddar and Monterey Jack cheese. A savory blend of onions, bell peppers, and diced tomatoes with green chilies adds depth and a Tex-Mex flair. Perfectly baked until bubbly and golden, this dish satisfies cravings while keeping carbs low. Garnish with green onions, cilantro, or avocado to add fresh, vibrant accents and creamy texture.

Updated on Sat, 14 Feb 2026 04:39:38 GMT
A golden, cheesy Keto Taco Casserole with cauliflower rice, seasoned ground beef, and bubbling Monterey Jack—comfort food made low-carb.  Pin It
A golden, cheesy Keto Taco Casserole with cauliflower rice, seasoned ground beef, and bubbling Monterey Jack—comfort food made low-carb. | dudesnack.com

This Keto Taco Casserole is a hearty, low-carb dish featuring seasoned ground beef, cauliflower rice, and a golden cheesy topping. It is the perfect solution for satisfying taco cravings while staying keto-friendly and gluten-free, providing all the bold Tex-Mex flavors you love without the extra carbohydrates.

A golden, cheesy Keto Taco Casserole with cauliflower rice, seasoned ground beef, and bubbling Monterey Jack—comfort food made low-carb.  Pin It
A golden, cheesy Keto Taco Casserole with cauliflower rice, seasoned ground beef, and bubbling Monterey Jack—comfort food made low-carb. | dudesnack.com

Ideal for busy weeknights, this casserole is a crowd-pleaser that combines convenience with high-quality ingredients. The blend of cheddar and Monterey Jack cheeses creates a bubbling, savory crust that perfectly complements the spiced beef and vegetable base.

Ingredients

  • 1 lb (450 g) ground beef (85% lean)
  • 1 tbsp olive oil
  • 1 medium onion, finely chopped
  • 2 cloves garlic, minced
  • 1 bell pepper (red or green), diced
  • 3 cups (350 g) riced cauliflower (fresh or frozen)
  • 1 (10 oz/280 g) can diced tomatoes with green chilies, drained
  • 2 tbsp taco seasoning (sugar-free, homemade or store-bought)
  • ½ tsp salt
  • ¼ tsp black pepper
  • 1 cup (110 g) shredded cheddar cheese
  • 1 cup (110 g) shredded Monterey Jack cheese
  • ½ cup (120 ml) sour cream
  • Optional toppings: Sliced green onions, chopped cilantro, diced avocado
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Instructions

Step 1
Preheat the oven to 375°F (190°C).
Step 2
Heat olive oil in a large skillet over medium heat. Add the onion and bell pepper, sauté for 3–4 minutes until softened.
Step 3
Add garlic and cook for 1 minute until fragrant.
Step 4
Add ground beef and cook, breaking up the meat, until browned and cooked through—about 5–6 minutes. Drain excess fat if necessary.
Step 5
Stir in taco seasoning, salt, pepper, and diced tomatoes with green chilies. Cook for 2 minutes.
Step 6
Add riced cauliflower and cook for another 3–4 minutes until just tender. Remove from heat.
Step 7
Stir in half of the cheddar and Monterey Jack cheeses, and the sour cream until well combined.
Step 8
Transfer the mixture to a greased 9x13-inch (23x33 cm) casserole dish. Sprinkle the remaining cheeses evenly over the top.
Step 9
Bake for 15–18 minutes, or until the cheese is melted and bubbly.
Step 10
Let cool for 5 minutes. Garnish with green onions, cilantro, and avocado if desired. Serve hot.

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To ensure the best consistency, be sure to drain the excess fat from the beef after browning. This prevents the casserole from becoming oily. If you are using frozen riced cauliflower, sauté it until the excess moisture has evaporated before adding the cheese and sour cream.

Varianten und Anpassungen

For extra spice, consider adding 1 diced jalapeño with the other vegetables. If you prefer a lighter protein, you can easily substitute ground turkey or chicken for the beef. Always ensure your taco seasoning is sugar-free to maintain the keto profile of the dish.

Serviervorschläge

Serve this dish hot with a garnish of green onions, cilantro, and diced avocado. It pairs beautifully with a crisp, dry white wine or sparkling water with lime. Please note that this recipe contains dairy from the cheese and sour cream.

Rich and hearty Keto Taco Casserole baked with savory beef, spicy tomatoes, and a melted cheddar topping for a Tex-Mex dinner.  Pin It
Rich and hearty Keto Taco Casserole baked with savory beef, spicy tomatoes, and a melted cheddar topping for a Tex-Mex dinner. | dudesnack.com

Each serving of this casserole contains approximately 340 calories, 23g of fat, and only 5g of net carbs. Store any leftovers in an airtight container in the refrigerator for up to 4 days for a quick and delicious low-carb meal later in the week.

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Recipe Questions & Answers

Can I substitute ground beef with other meats?

Yes, ground turkey or chicken can be used as alternatives for a lighter protein option while maintaining flavor.

Is cauliflower rice essential in this dish?

Cauliflower rice provides a low-carb base that absorbs the spices and moisture, creating a hearty texture without traditional grains.

How can I add more spice to the dish?

Adding diced jalapeño peppers during the vegetable sauté enhances heat and complexity without overwhelming other flavors.

What cheese types are best for the topping?

Cheddar and Monterey Jack melt well and offer a rich, creamy topping that browns nicely under baking.

Can leftovers be stored safely?

Store in an airtight container in the refrigerator for up to 4 days to maintain freshness and flavor.

Keto Taco Casserole Cheesy

Low-carb casserole with seasoned beef, cauliflower rice, and melted cheese, perfect for a filling Tex-Mex dinner.

Prep Time
15 minutes
Time to Cook
30 minutes
Overall Time
45 minutes
Created by Jake Anderson

Recipe Category Quick Dude Dinners

Skill Level Easy

Cuisine Type Tex-Mex

Output 6 Portion Size

Diet Preferences Free from Gluten, Low in Carbs

What You'll Need

Meat & Protein

01 1 pound ground beef (85% lean)
02 1 tablespoon olive oil

Vegetables

01 1 medium onion, finely chopped
02 2 cloves garlic, minced
03 1 bell pepper (red or green), diced
04 3 cups riced cauliflower (fresh or frozen)
05 1 can (10 ounces) diced tomatoes with green chilies, drained

Seasonings

01 2 tablespoons sugar-free taco seasoning
02 ½ teaspoon salt
03 ¼ teaspoon black pepper

Dairy

01 1 cup shredded cheddar cheese
02 1 cup shredded Monterey Jack cheese
03 ½ cup sour cream

Optional Toppings

01 Sliced green onions
02 Chopped cilantro
03 Diced avocado

How to Make It

Step 01

Preheat Oven: Preheat the oven to 375°F (190°C).

Step 02

Sauté Aromatics: Heat olive oil in a large skillet over medium heat. Add the onion and bell pepper, sauté for 3 to 4 minutes until softened.

Step 03

Cook Garlic: Add minced garlic and cook for 1 minute until fragrant.

Step 04

Brown Beef: Add ground beef and cook, breaking up the meat, until browned and cooked through, about 5 to 6 minutes. Drain excess fat if necessary.

Step 05

Season and Add Tomatoes: Stir in taco seasoning, salt, pepper, and diced tomatoes with green chilies. Cook for 2 minutes.

Step 06

Cook Cauliflower Rice: Add riced cauliflower and cook for another 3 to 4 minutes until just tender. Remove from heat.

Step 07

Incorporate Cheese and Sour Cream: Stir in half of the cheddar and Monterey Jack cheeses, and the sour cream until well combined.

Step 08

Transfer to Casserole Dish: Transfer the mixture to a greased 9 by 13-inch casserole dish. Sprinkle the remaining cheeses evenly over the top.

Step 09

Bake Until Cheese Melts: Bake for 15 to 18 minutes, or until the cheese is melted and bubbly.

Step 10

Cool and Garnish: Let cool for 5 minutes. Garnish with green onions, cilantro, and avocado if desired. Serve hot.

Gear Needed

  • Large skillet
  • Cutting board and knife
  • 9 by 13-inch casserole dish
  • Mixing spoon
  • Oven

Allergy Details

Always review all ingredients for allergens before starting. Check with a health specialist if uncertain.
  • Contains dairy (cheese, sour cream).
  • Gluten-free if using certified gluten-free taco seasoning.
  • Always check labels for hidden gluten or sugar in seasonings.

Nutrition Details (per portion)

Nutrition info is for guidance and isn't a substitute for professional advice.
  • Calorie Count: 340
  • Fats: 23 g
  • Carbohydrates: 7 g
  • Proteins: 23 g