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Fajita Chicken Casserole Bake

This Fajita Chicken Casserole Bake combines tender shredded chicken, fajita-seasoned vegetables, creamy soup, and melted cheese into one bubbling, flavor-packed oven dish.

Ingredients

Scale

Main Base:

4 cups (approximately 600 g) shredded cooked chicken breast

2 cups (370 g) uncooked instant white rice

1 can (298 g / 10.5 oz) cream of chicken soup

1 cup (240 g) sour cream

1 cup (140 g) frozen diced onion and bell pepper blend

1 can (284 g / 10 oz) diced tomatoes with green chilies, undrained (e.g., Rotel)

360 ml (1½ cups) chicken broth

1 packet (32 g / 1.25 oz) fajita seasoning

Cheese Topping:

1 bag (227 g / 8 oz) shredded Mexican-style cheese blend

Instructions

✅ Step 1: Preheat and Prepare

  • Preheat your oven to 175°C (350°F).

  • Lightly grease a 23×33 cm (9×13-inch) baking dish with nonstick spray or oil.

✅ Step 2: Mix Ingredients

In a large mixing bowl, combine the following:

  • 4 cups shredded cooked chicken

  • 2 cups uncooked instant white rice

  • 1 can cream of chicken soup

  • 1 cup sour cream

  • 1 cup frozen diced onion and bell pepper blend

  • 1 can diced tomatoes with chilies (do not drain)

  • 360 ml chicken broth

  • 1 packet fajita seasoning

  • Half of the shredded Mexican cheese blend (save the rest for topping)

Mix thoroughly until well combined.

✅ Step 3: Assemble

  • Pour the mixture evenly into the greased baking dish.

  • Use a spatula to spread the top flat for even baking.

✅ Step 4: First Bake (Covered)

  • Cover the dish tightly with aluminum foil.

  • Bake in the preheated oven for 35 minutes.

✅ Step 5: Final Bake (Uncovered)

  • Remove foil.

  • Sprinkle the remaining cheese evenly over the top.

  • Return to oven and bake uncovered for 10 more minutes, or until the cheese is melted and bubbly.

✅ Step 6: Rest & Serve

  • Remove from oven and let rest for 5–10 minutes before serving.

  • This helps the casserole set and makes slicing easier.

Notes

  • Chicken: Use leftover rotisserie chicken for convenience and extra flavor. You can shred it easily using forks or a mixer.

  • Rice: Instant white rice is essential for this recipe. Long-grain or brown rice won’t cook properly unless pre-cooked.

  • Spice Level: For a milder dish, use plain diced tomatoes instead of ones with chilies. For more heat, add sliced jalapeños or cayenne pepper.

  • Vegetarian Version: Substitute chicken with canned black beans, corn, or seasoned tofu.

  • Low-Carb Version: Use cauliflower rice instead of instant rice for a keto-friendly alternative.

  • Make Ahead: You can assemble the entire casserole a day in advance, refrigerate, and bake when ready.