Save to feedthepins This satisfying Tex-Mex inspired bake brings together tender shredded chicken, three types of colorful bell peppers, and sweet caramelized onions. The creamy layer comes from a blend of sour cream and cream cheese, while Mexican shredded cheese creates a golden bubbly topping. Classic fajita seasonings including chili powder, cumin, and smoked paprika infuse every bite with authentic Southwestern flavor.
The dish comes together quickly—sauté the vegetables until softened, mix everything in a bowl, then spread into your casserole dish and bake. The result is a cheesy, comforting meal that captures all the flavors of traditional fajitas without the fuss of individual assembly.
My apartment smelled incredible when my roommate walked in last Tuesday, poking her head into the kitchen with that whats-for-dinner look. Id been craving fajitas but wanted something I could throw in the oven and forget about, and this casserole was born from lazy brilliance. She ended up staying for dinner and polishing off two helpings.
I first made this on a rainy Sunday when rotisserie chicken was on sale and my bell peppers were looking a little sad. The cheese bubbled up golden brown, and I knew Id stumbled onto something that would become a regular rotation. Now its my go-to when friends are coming over and I want actual time to hang out instead of constantly cooking at the stove.
Ingredients
- 3 cups cooked chicken breast, shredded or cubed: Rotisserie chicken works beautifully here and saves so much time
- 3 large bell peppers, mixed colors: The variety makes it gorgeous, and each brings a slightly different sweetness
- 1 large onion, sliced: Red onion adds nice color but yellow or white work perfectly too
- 2 cups shredded Mexican blend cheese: Dont skimp here, that cheesy top is everything
- 1/2 cup sour cream plus 4 oz cream cheese: This duo creates the creamiest, most luxurious sauce
- 1 can (10 oz) diced tomatoes with green chilies, drained: Adds that classic fajita zing without making it soupy
- 1 tsp chili powder, 1 tsp cumin, 1/2 tsp smoked paprika: The holy trinity of Tex-Mex flavor
- 1/2 tsp garlic powder, 1/2 tsp onion powder, 1/4 tsp cayenne: Layers of flavor that build depth
- 1 tbsp olive oil: For getting those peppers nicely softened and sweet
- Fresh cilantro and green onions: The finishing touch that makes it feel restaurant worthy
Instructions
- Get your oven ready:
- Preheat to 375°F and grease a 9x13-inch baking dish with butter or cooking spray.
- Sauté the vegetables:
- Heat olive oil in a large skillet over medium-high heat, cook the sliced peppers and onions for 6 to 8 minutes until theyre soft and starting to caramelize.
- Mix it all together:
- In a large bowl, combine the chicken, cooked vegetables, diced tomatoes with green chilies, all the spices, cream cheese, and sour cream until everything is well coated.
- Assemble the casserole:
- Spread the mixture evenly in your prepared dish, then sprinkle that glorious Mexican cheese all over the top.
- Bake until bubbly:
- Bake uncovered for 25 to 30 minutes until hot throughout and the cheese has turned golden brown in spots.
- Finish and serve:
- Let it rest for 5 minutes, then scatter fresh cilantro and green onions on top before digging in.
Save to feedthepins Last month my dad asked for the recipe after trying it at my place, which is basically the highest compliment possible. Hes now making it for his poker nights, and apparently everyone asks him to bring it every time.
Make It Your Own
Ive used leftover Thanksgiving turkey instead of chicken, and honestly, it might be even better. You can also throw in some corn or black beans if you want to bulk it up or stretch it to feed more people.
Serving Suggestions
Warm flour tortillas on the side are non-negotiable in my house, but this is also incredible served over cilantro lime rice. A simple green salad with a bright vinaigrette cuts through all that rich cheese perfectly.
Make Ahead Magic
You can assemble the entire casserole up to 24 hours in advance, cover it tightly, and keep it in the refrigerator. Just add 5 to 10 minutes to the baking time since it will be cold going into the oven. This has saved me so many times when hosting dinner.
- Freeze assembled unbaked casseroles for up to 3 months
- Thaw overnight in the fridge before baking as directed
- Cover with foil if the top browns too quickly
Save to feedthepins Theres something deeply satisfying about a casserole that tastes like you spent hours at the stove when you really just tossed it together. Hope this becomes a staple in your kitchen like it has in mine.
Recipe Q&A
- → Can I use raw chicken instead of cooked?
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Cooked chicken works best for this dish since it only bakes for 25-30 minutes. If using raw chicken, cook it completely in the skillet first before combining with the other ingredients.
- → What can I serve with this casserole?
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Warm flour or corn tortillas, Spanish rice, refried beans, or a fresh green salad all complement this dish well. The casserole is filling enough to stand alone as a complete meal.
- → Can I make this ahead of time?
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Yes. Assemble the entire casserole, cover tightly, and refrigerate for up to 24 hours before baking. You may need to add 5-10 minutes to the baking time if baking cold from the refrigerator.
- → How do I store leftovers?
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Store cooled leftovers in an airtight container in the refrigerator for 3-4 days. Reheat individual portions in the microwave or cover the dish with foil and reheat in a 350°F oven until warmed through.
- → Can I freeze this casserole?
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Yes. Wrap the unbaked casserole tightly in plastic wrap and foil, then freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.
- → How can I make this spicier?
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Add diced jalapeños to the vegetable mix, increase the cayenne pepper to 1/2 teaspoon, use pepper jack cheese instead of Mexican blend, or serve with hot sauce on the side.
