High-Protein Cheesy Chicken Fajita Casserole

ByHannah Peterson

This is cheesy, bubbling casserole — tender shredded chicken mixed with sautéed peppers and onions, baked under a golden layer of melted cheese with steam rising. It has all the bold fajita flavors in one easy, comforting dish.

Why You’ll Love This Recipe

  • Gooey melted cheese and juicy chicken with colorful veggies exactly like your photo
  • Extremely high protein and satisfying
  • One-dish meal that’s great for meal prep
  • Bold fajita taste without the carbs
  • Keto, diabetic-friendly, and family favorite

Ingredients (Serves 6)

  • 2 lbs (900g) cooked shredded chicken (breast or thighs)
  • 3 bell peppers (mixed colors), diced
  • 1 large onion, diced
  • 3 cloves garlic, minced
  • 2 tbsp olive oil
  • 1–2 tbsp fajita seasoning (sugar-free)
  • 8 oz (225g) cream cheese, softened
  • ½ cup heavy cream or chicken broth
  • 3 cups (300g) shredded cheddar or Mexican cheese blend
  • Salt & pepper to taste
  • Optional: jalapeños, cilantro, lime wedges

Instructions

  1. Preheat oven to 375°F (190°C). Grease a large baking dish.
  2. Heat oil in a skillet. Sauté onions and bell peppers until softened (5–6 minutes). Add garlic and cook 30 seconds.
  3. Add shredded chicken, fajita seasoning, salt, and pepper. Stir well.
  4. Mix in cream cheese and heavy cream until creamy. Transfer to the baking dish.
  5. Top evenly with shredded cheese.
  6. Bake 20–25 minutes until cheese is bubbly and golden. Broil for the last 2 minutes if desired for extra browning.
  7. Let rest 5 minutes. Garnish with cilantro and serve with lime.

Prep Time: 15 minutes Bake Time: 20–25 minutes Total Time: 35–40 minutes

Nutrition (Per Serving)

  • Calories: ~380
  • Protein: 38g (very high)
  • Total Carbs: 8g
  • Net Carbs: 6g
  • Fat: 24g

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