High-Protein Cheesy Chicken Fajita Bake
Chicken, peppers, and onion under melted cheese — ready in 30 minutes
This high-protein cheesy chicken fajita bake layers chicken breast with sliced red and green peppers and onion, seasons it with fajita spices, and bakes under a blanket of cheese until the top browns in spots, like the glass dish. Each serving has 32 g of protein and 5 g net carbs.
Low carb, sugar-free, and no tortillas.
Why you’ll love this bake
- 32g protein per serving
- 5g net carbs
- Peppers and onion
- Ready in about 30 minutes
- Melted cheese
- One dish
Health notes
- Protein: Chicken breast and a little cheese.
- Low carb: Peppers and onion. No tortillas or sugar.
- Sugar-free: No added sugar in the seasoning.
- Keto-friendly: Each serving stays around 5g net carbs if the peppers are measured.
Key element — use a sugar-free seasoning
Some fajita packets add sugar. Check the label so the 5g number holds, like the dish.
Ingredients
Bake (4 servings)
- 1½ lb boneless skinless chicken breast, cut into strips or pieces
- 1 red bell pepper, sliced
- 1 green bell pepper, sliced
- 1 medium onion, sliced
- 2 Tbsp olive oil
- 1–2 tsp fajita seasoning (sugar-free)
- ½ tsp salt
- ¼ tsp black pepper
- 1½ cups shredded cheddar or Mexican blend cheese
Swaps
- Tortillas or a sugar seasoning: Not in the 5g number.
- Chicken thighs: Same amount. Fat rises a little.
- No cheese: Protein drops a little. Calories drop.
- Extra peppers: Carbs rise. Measure them.
Instructions
| 1 | Heat the oven. Heat to 400°F (200°C). Oil a baking dish. |
| 2 | Toss. In a bowl, toss the chicken, peppers, and onion with oil, fajita seasoning, salt, and pepper. |
| 3 | Layer. Spread everything in the dish. Top with the cheese. |
| 4 | Bake. Bake 18–22 minutes until the chicken is cooked through and the cheese is melted with a few browned spots, like the dish. Rest 5 minutes. This batch makes 4 servings. |
Pro tips
- Use a sugar-free fajita seasoning. Some packets add sugar.
- Tortillas are not in these numbers.
- Do not overbake. Pull when the cheese is just browned in spots.
- Rest 5 minutes so the juices settle.
- Macros are per serving, 4 from this dish.
Nutrition
| Nutrient | Per serving |
|---|---|
| Calories | 310 |
| Protein | 32g |
| Net carbohydrates | 5g |
| Total carbohydrates | 7g |
| Fiber | 2g |
| Total fat | 16g |
| Sodium | 620mg |
Estimates based on chicken breast, peppers, onion, sugar-free fajita seasoning, and cheese, divided into 4 servings. Tortillas and a sugar seasoning are not included.
Variations
Chicken thighs
Same amount. Fat rises a little.
No cheese
Skip it. Calories drop. Protein drops a little.
Extra heat
Add a pinch of cayenne or sliced jalapeño.
One pepper only
Use less. Carbs drop a little.
Storage
| Method | Time | Notes |
|---|---|---|
| Refrigerator | Up to 4 days | Cover once cool |
| Reheat | 2 min | Microwave or a short oven |
| Freezer | Up to 2 months | Cool fully. Thaw in the fridge |
FAQ
Test your knowledge
5 quick questions about this chicken fajita bake
1. Protein per serving?
2. Net carbs per serving?
3. What keeps the carbs at 5g?
4. About how long does this take?
5. What is not in the 5g number?
