High-Protein Cheesy Taco Casserole
Seasoned ground beef, peppers, and tomatoes baked under a blanket of melted cheese — high-protein, low-carb, and ready in 30 minutes
This high-protein cheesy taco casserole is a one-pan favorite loaded with seasoned ground beef, colorful peppers, tomatoes, and plenty of melted cheese. Every serving delivers 28 g of protein and only 5 g net carbs for a satisfying taco-night dinner without the carbs.
Completely sugar-free, low-carb, and perfect for busy weeknights or meal prep.
Why you’ll love this casserole
- 28g protein per serving — a complete high-protein meal
- Only 5g net carbs and fully sugar-free
- Classic taco flavors with melted cheese on top
- Ready in about 30 minutes
- One baking dish, easy cleanup
- Excellent for meal prep and leftovers
Health notes
- High protein: Ground beef and cheese provide a solid protein base.
- Low carb: Peppers, tomatoes, and no tortillas keep net carbs low.
- Sugar-free: Use a sugar-free taco seasoning or homemade blend.
- Family-friendly: Kid-approved flavors in a convenient casserole form.
Key element — drain the beef well
After browning the ground beef, drain excess fat thoroughly. This keeps the casserole from becoming greasy and helps the flavors stay clean and balanced.
A-High Protein
High-Protein Cheesy Taco Casserole
- Prep10 min
- Cook20 min
- Total30 min
- Servings6 servings
- Calories290 kcal
Ingredients
Instructions
- Preheat and brown the beef. Preheat oven to 375°F (190°C). In a large skillet over medium-high heat, cook the ground beef until browned, breaking it up as it cooks. Drain excess fat thoroughly.
- Add vegetables and seasoning. Add the diced onion, bell peppers, and garlic to the skillet. Cook 4–5 minutes until softened. Stir in the taco seasoning, diced tomatoes, salt, and pepper. Cook 2–3 minutes more until fragrant and slightly thickened. Taste and adjust seasoning.
- Assemble the casserole. Transfer the beef mixture to a lightly greased 9×13-inch baking dish (or similar). Spread evenly. Sprinkle the shredded cheese evenly over the top.
- Bake. Bake 12–15 minutes until the cheese is melted and bubbly. For extra browning, broil the last 1–2 minutes while watching closely.
- Rest and serve. Let the casserole rest 3–5 minutes. Garnish with cilantro or green onion if desired and serve hot.
Notes & Tips
- Drain the beef well so the casserole stays flavorful without excess grease.
- Use a sugar-free taco seasoning or make your own to keep it fully sugar-free.
- For creamier texture, stir a few tablespoons of cream cheese or sour cream into the beef mixture before baking.
- This reheats excellently and is ideal for meal-prep lunches.
- Serve with a simple side salad, avocado, or cauliflower rice for a complete low-carb meal.
Variations & serving ideas
- Turkey or chicken: Use ground turkey or chicken for a leaner version.
- Extra veggies: Add zucchini, cauliflower rice, or spinach.
- Spicy: Add diced jalapeños or extra cayenne.
- Dairy-free: Use a dairy-free shredded cheese alternative.
- Loaded version: Top with sliced avocado, sour cream, and fresh cilantro after baking.
- Cauliflower rice base: Mix in 2–3 cups cooked cauliflower rice with the beef for extra bulk and volume.
- Spicy kick: Add diced jalapeños or a pinch of cayenne to the seasoning.
- Chicken version: Swap ground beef for ground chicken or turkey.
Storage
- Refrigerator: Up to 4 days (Covered; reheat in the oven or microwave)
- Freezer: Up to 2 months (Freeze before or after baking; thaw overnight in the fridge)
- Meal prep: Up to 4 days (Perfect for grab-and-go lunches)
Nutrition Facts
Per serving · makes 6 servings
| Nutrient | Amount per serving |
|---|---|
| Calories | 290 kcal |
| Total fat | 16 g |
| Sodium | 520 mg |
| Total carbohydrate | 8 g |
| Fibre | 3 g |
| Protein | 28 g |
Nutrition values are approximate and vary with brands and portion sizes.
Frequently asked questions
Is this casserole keto-friendly?
Yes. At only 5g net carbs per serving it fits most keto plans when made with sugar-free seasoning.
Can I use ground turkey?
Yes. Ground turkey or chicken works well for a leaner version. Season generously for best flavor.
How do I keep it from being greasy?
Use lean ground beef and drain the fat thoroughly after browning.
Can I make it ahead?
Yes. Assemble up to a day ahead, cover, and refrigerate. Bake when ready, adding a couple of extra minutes if cold.
What can I serve with it?
A simple side salad, sliced avocado, sour cream, or cauliflower rice all stay low-carb.
Can I freeze leftovers?
Yes. Freeze individual portions for up to 2 months. Thaw in the refrigerator and reheat in the oven or microwave.
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