When a weeknight feels especially full, a simple baked dinner like this low carb 4-ingredient chicken fajita bake earns a regular place in the rotation. It takes the classic flavors of chicken fajitas—seasoned chicken, sweet peppers, and plenty of melted cheese—and turns them into an easy casserole-style meal with almost no fuss. Because everything bakes together in one dish, you get plenty of flavor with very little hands-on work, which is exactly why recipes like this tend to get passed from one busy household to another.
This bake is satisfying on its own, but it also pairs well with a crisp green salad, cauliflower rice, or simple steamed broccoli if you want to keep the meal low carb. For anyone at the table who wants a more traditional fajita-style plate, you can serve it with warm tortillas, salsa, sour cream, sliced avocado, or a spoonful of guacamole. A squeeze of fresh lime and a little chopped cilantro on top brighten the rich, cheesy finish nicely.
Low Carb 4-Ingredient Chicken Fajita Bake
Servings: 4 to 6
Ingredients
2 pounds boneless, skinless chicken breasts, sliced into strips
2 bell peppers, 1 red and 1 green, sliced
1 packet fajita seasoning, about 1 ounce
2 cups shredded cheddar cheese
Directions
1. Preheat the oven to 375°F. Lightly grease a 9x13-inch glass baking dish.
2. Spread the sliced chicken and bell peppers evenly in the baking dish. Sprinkle the fajita seasoning over everything, then toss gently in the dish until the chicken and peppers are well coated.
3. Cover the dish tightly with foil and bake for 25 minutes, or until the chicken is nearly cooked through and the peppers have started to soften.
4. Remove the foil, sprinkle the shredded cheddar evenly over the top, and return the dish to the oven for 10 to 15 minutes, until the cheese is melted, bubbling, and the chicken is fully cooked.
5. Let the bake rest for 5 minutes before serving so the juices settle and the cheese sets slightly. Serve hot.
Variations & Tips
Use chicken thighs: Boneless, skinless chicken thighs work very well here and tend to stay especially juicy. Slice them into even strips so they cook at the same rate as the peppers.
Change the cheese: Cheddar gives a familiar, sharp finish, but a Monterey Jack or Mexican-style blend melts beautifully too. If you want more browning on top, place the dish under the broiler for 1 to 2 minutes at the end, watching closely.
Add extra fajita flavor: Although the four-ingredient version is the beauty of this recipe, a little lime juice, sliced onion, or a spoonful of salsa can be added if you do not mind stepping beyond the shortest ingredient list. Those additions bring it even closer to classic skillet fajitas.
Avoid watery results: Chicken and peppers naturally release moisture as they bake. If your dish looks a bit juicy, simply let it rest before serving, or use a slotted spoon to plate it. Cutting the peppers into thicker slices also helps them stay pleasantly tender instead of too soft.