Alright, you guys, this Cheesy Keto Chicken Fajita Casserole is about to become your low-carb dinner MVP.

It’s loaded with tender, juicy chicken, colorful sautéed veggies, a creamy layer of melted cheese, and bold, zesty fajita spices that pack a punch. The best part? It’s all baked together in one dish, making cleanup a breeze.

Perfect for busy weeknights, meal prep, or anytime you’re craving that Tex-Mex flair without the carbs.

Plus, it’s easy to customize with your favorite toppings, and it’ll still be a delicious treat!

Cheesy Keto Chicken Fajita Casserole Recipe

Optional Add-Ons

• ½ cup sliced jalapeños: For extra spice.
• 1 tbsp chopped cilantro: Adds a fresh, herbaceous touch.
• ½ cup diced tomatoes: For added juiciness and a burst of color.

Step-by-Step Instructions

Step 1: Preheat the Oven: Preheat your oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish with non-stick spray or olive oil.

Step 2: Prepare the Chicken: Cut the chicken breasts into bite-sized pieces or strips. Season generously with salt, pepper, 1 tablespoon of fajita seasoning, and paprika.

Step 3: Cook the Chicken: Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Add the chicken pieces and cook for 5-7 minutes, or until lightly browned and almost cooked through. Transfer the chicken to the prepared baking dish, spreading it out evenly.

Step 4: Sauté the Vegetables: In the same skillet, add a bit more olive oil if needed. Toss in the sliced red pepper and onion, along with the remaining 1 tablespoon of fajita seasoning. Sauté for 4-5 minutes until the vegetables are softened but still slightly crisp. Layer the sautéed vegetables over the chicken in the baking dish.

Step 5: Make the Creamy Cheese Mixture: In a small bowl, mix the softened cream cheese with ½ cup of shredded cheddar cheese until smooth and creamy. Spread this mixture evenly over the chicken and vegetable layer.

Step 6: Add the Cheesy Topping: Sprinkle the remaining shredded cheddar cheese evenly over the casserole. If using optional toppings like jalapeños or diced tomatoes, scatter them on top at this stage.

Step 7: Bake the Casserole: Place the baking dish in the preheated oven and bake uncovered for 25-30 minutes, or until the cheese is melted, bubbly, and slightly golden on top.

Step 8: Cool and Serve: Remove the casserole from the oven and let it cool for 5 minutes before serving. Garnish with freshly chopped cilantro if desired.

Tips for Success

• Cut Chicken Evenly: Ensure chicken pieces are of uniform size for even cooking.
• Don’t Overcook the Veggies: Keep the peppers and onions slightly crisp to maintain texture.
• Soften the Cream Cheese: Bring cream cheese to room temperature before mixing for a smoother spread.
• Layer Evenly: Distribute ingredients evenly for a consistent bite in every serving.

Storage and Reheating

Storage

• Refrigeration: Store leftovers in an airtight container in the refrigerator for up to 3 days.
• Freezing: Freeze individual portions in freezer-safe containers for up to 2 months. Thaw overnight in the refrigerator before reheating.

Reheating

• Oven: Reheat in a 350°F (175°C) oven for 15-20 minutes until warmed through.
• Microwave: Heat individual portions in the microwave for 2-3 minutes, stirring halfway through for even heating.

Serving Suggestions

This cheesy keto chicken fajita casserole pairs wonderfully with:

• Cauliflower Rice: A low-carb alternative to rice that soaks up the creamy sauce.
• Zucchini Noodles: Adds texture and keeps the meal keto-friendly.
• Keto Tortillas: Use for scooping or wrapping the casserole for a taco-inspired meal.

Why This Recipe Works

This casserole isn’t just easy to make—it’s a true crowd-pleaser that fits into your healthy eating goals.

Packed with protein, flavor, and satisfying cheesy goodness, it’s a dish that works for weeknight dinners, leftovers, or even a cozy meal with friends.

Try it out, and bring a little Tex-Mex magic to your kitchen—your taste buds (and your schedule) will thank you!