All the flavor of sizzling restaurant fajitas, none of the hassle—this one-pan keto dinner is quick, colorful, and downright delicious.
I don’t know about you, but if I can scatter and strew a bunch of ingredients onto a sheet pan, put it in the oven, and sit down to rest while dinner cooks, then I know two things. First, I’m grateful for those few quiet minutes, and second, dinner’s going to taste even better because I’ll enjoy it more having caught my breath. There’s something deeply satisfying about knowing the oven is doing the heavy lifting while you take a little pause.
That’s why I love sheet-pan dinners, and these keto chicken fajitas are about as easy as they come. Bright strips of red, yellow, and green bell peppers mingle with juicy marinated chicken, soaking up the smoky heat of chili powder, cumin, and paprika. A quick trip under the broiler at the end caramelizes the edges, giving you that irresistible char you’d swear came straight off a sizzling cast-iron skillet at your favorite Mexican spot.
And the best part? It all happens with one pan and almost no cleanup. No standing over a stove, no grease splattering on your countertops—just tender, flavorful chicken and vegetables that come out of the oven ready to pile into low-carb tortillas, spoon over cauliflower rice, or simply eat straight off the pan. This is weeknight keto cooking at its best: simple, vibrant, and downright delicious.
Once you taste how easy and satisfying these fajitas are, you’ll want to make them part of your regular rotation. Sheet-pan meals like this remind me that sometimes the best dishes are also the simplest—just honest ingredients, bold flavor, and a little time in a hot oven.
The best low-carb ways to enjoy these fajitas
If you’re craving a classic handheld, reach for keto tortillas. Want to skip tortillas altogether? Try a fajita taco salad piled high with sizzling chicken and peppers, crunchy homemade pico, crushed low-carb tortilla chips, creamy avocado, and a drizzle of full-fat ranch. Or spoon the mixture over garlicky cauliflower rice for a cozy bowl that soaks up every drop of smoky, tangy marinade. However you serve them, these fajitas adapt to your cravings—proof that keto dinners can be just as fun and flavorful as the original.
How do I store leftovers?
Cool completely, then refrigerate the chicken and peppers in an airtight container for 3–4 days (store toppings like pico, avocado, and sauces separately). To freeze, portion the fajita mix into airtight containers or freezer bags, press out excess air, label, and freeze up to 2–3 months; do not freeze fresh toppings or tortillas. Thaw overnight in the refrigerator. Reheat on a sheet pan at 375°F for 8–12 or microwave in 30–45 second bursts if needed (peppers may soften).
Similar recipes to try
For the best shredded chicken recipe I know of, try this Mexican Shredded Chicken made in the Instant Pot or Crock-Pot. It’s tender, juicy, and seasoned just right—perfect for piling into lettuce wraps, spooning over cauliflower rice, or topping with fresh pico. If you’re in the mood for something bubbling and cheesy, this Chicken Enchilada Casserole is pure comfort food, with layers of saucy chicken and melted cheese that deliver all the flavors of enchiladas but in casserole form. And when you want big, bold flavor in every slice, this Mexican Lasagna is the way to go—stacked with seasoned meat, black beans, and gooey cheese, it’s a twist on a classic that never skimps on satisfaction.
Keto Sheet-Pan Chicken Fajitas
Ingredients
- 1 1/2 boneless chicken breasts about 3 large pieces
- 5 ounces yellow bell pepper about 1 medium sized pepper
- 5 ounces red bell pepper about 1 medium sized pepper
- 5 ounces green bell pepper about 1 medium sized pepper
- 1/4 cup avocado oil
- 3 teaspoons hot sauce
- 1 teaspoon lime juice
- 1 teaspoon cumin
- 1 teaspoon salt
- 2 garlic cloves chopped
- 1 teaspoon sweetener
- 1/4 teaspoon chili powder
- 1/4 teaspoon smoked paprika
Instructions
- Slice chicken breasts into very thin strips lengthwise. Cut each strip in half lengthwise again. Imagine the thickness of fajitas from Mexican restaurants when you’re cutting.
- Slice the peppers into thin strips.
- In a measuring cup, combine all remaining ingredients and whisk together to create the marinade
- Place the peppers and chicken strips in a large bowl or Ziploc bag. Pour the marinade on top and refrigerate 30 minutes (up to overnight).
- Preheat oven to 425°F.
- Using a baking sheet with a roasting rack on top, spread the pepper and chicken mixture in an even layer.
- Bake for 15 minutes, then put under the broiler for 5 minutes to crisp up the edges before serving.
Leave a Comment