This Keto Mexican Chicken Casserole is a tasty, cheesy dish packed with seasoned chicken, crunchy veggies, and a perfect hint of spice. It’s a great way to enjoy all those bold Mexican flavors while sticking to a low-carb lifestyle. You’ll find melted cheese, juicy chicken, and some fresh herbs that come together to make every bite satisfying and cozy.
I love making this casserole when I want something simple but flavorful. It’s one of those recipes I can throw together quickly, and it always ends up tasting like I spent hours cooking. Plus, it’s perfect for meal prep because it keeps well and tastes even better the next day. I like to add a little extra cheese on top to make it nicely golden and gooey.
When I serve it, I usually add some sour cream and avocado on the side, which balances the spices perfectly. It’s a dish that always brings smiles at the dinner table, and I find myself reaching for seconds almost every time. Whether for a family dinner or a casual get-together, this casserole is a crowd-pleaser that feels like a warm hug in a bowl.
Key Ingredients & Substitutions
Shredded Chicken: Rotisserie chicken works great for convenience, but boiled or grilled chicken also shines here. Feel free to swap for turkey if you prefer a leaner option.
Salsa: Pick a no-sugar-added salsa to keep it keto-friendly. If fresh salsa is hard to find, a simple mix of diced tomatoes, onion, and lime juice works well too.
Cheddar Cheese: Sharp cheddar adds bold flavor and melts beautifully. You can substitute with Monterey Jack or a Mexican cheese blend if you like it milder.
Sour Cream: This adds creaminess and a mild tang. Greek yogurt is a good low-carb alternative if you want a lighter option.
Spices: Garlic powder, chili powder, cumin, and smoked paprika give the casserole its signature Mexican flavor. Adjust the chili powder if you like it spicier or milder.
Black Olives & Fresh Garnishes: Black olives add a salty bite, but feel free to omit if you’re not a fan. Fresh tomatoes and cilantro brighten the dish and add a fresh finish.
How Do You Make This Casserole Perfectly Cheesy and Loaded with Flavor?
This casserole is all about balancing flavors and textures. Here’s how to get it just right:
- Mix the chicken and sauce well: Combine the shredded chicken with salsa, sour cream, and spices thoroughly. This ensures every bite is flavorful.
- Use half the cheese inside the mix: Melting cheese inside the casserole keeps it moist and rich.
- Save some cheese for topping: This melts and browns in the oven to create a cheesy crust that’s super satisfying.
- Bake uncovered: This lets the cheese brown nicely and the dish firm up.
- Let it rest: A few minutes out of the oven helps the casserole set so it slices cleanly.
Equipment You’ll Need
- 9×13-inch baking dish – It’s the perfect size to hold all the ingredients comfortably and bake evenly.
- Large mixing bowl – For thoroughly combining the shredded chicken, salsa, sour cream, and spices.
- Measuring spoons and cups – To measure out spices and ingredients accurately.
- Cooking spoon or spatula – For mixing everything well and spreading the mixture in the dish.
- Oven – To bake the casserole until bubbly and golden on top.
Flavor Variations & Add-Ins
- Protein Swap: Use cooked ground beef or turkey instead of chicken for a different flavor punch.
- Cheese Options: Mix in Monterey Jack or pepper jack cheese for extra creaminess or spice.
- Vegetable Boost: Add cooked bell peppers, zucchini, or spinach for more nutrients and color.
- Extra Heat: Mix in chopped jalapeños or sprinkle in cayenne pepper if you like more spice.
Keto Mexican Chicken Casserole
Ingredients You’ll Need:
- 3 cups cooked shredded chicken (rotisserie or boiled)
- 1 cup salsa (no sugar added)
- 1 cup shredded sharp cheddar cheese, divided
- 1/2 cup sour cream
- 1 small onion, finely chopped
- 1 tsp garlic powder
- 1 tsp chili powder
- 1/2 tsp ground cumin
- 1/2 tsp smoked paprika
- Salt and pepper to taste
- 1/4 cup sliced black olives
- 1/2 cup diced fresh tomatoes (optional for garnish)
- Fresh cilantro, chopped (for garnish)
- 2 tbsp olive oil or avocado oil
How Much Time Will You Need?
This casserole takes about 10 minutes to prepare and around 20-25 minutes to bake. After baking, let it rest for 5 minutes before serving. So, plan for about 35-40 minutes total to enjoy this tasty dish.
Step-by-Step Instructions:
1. Prepare the Chicken Mixture:
In a large bowl, mix together the shredded chicken, salsa, sour cream, half of the shredded cheddar cheese, chopped onion, garlic powder, chili powder, cumin, smoked paprika, salt, and pepper. Stir it well so all the flavors blend nicely.
2. Assemble the Casserole:
Coat a 9×13-inch baking dish with olive oil or avocado oil. Spread the chicken mixture evenly into the dish. Then, sprinkle the remaining cheddar cheese over the top. Add sliced black olives evenly on top of the cheese.
3. Bake and Serve:
Bake the casserole uncovered in your preheated 375°F (190°C) oven for 20-25 minutes. You’ll know it’s ready when the cheese is melted, bubbly, and slightly golden. Let the casserole rest for 5 minutes after baking. Finish by garnishing with diced fresh tomatoes and chopped cilantro. Serve warm, and if you like, add sour cream or sliced avocado on the side for extra creaminess.
Can I Use Frozen Chicken for This Casserole?
Yes! Just be sure to thaw the chicken completely before using. You can thaw it overnight in the fridge or use the quick thaw method by placing it in a sealed bag and submerging it in cold water. Pat it dry before mixing to avoid extra moisture.
Can I Make This Casserole Ahead of Time?
Absolutely! Prepare the casserole up to the baking step, then cover and refrigerate for up to 24 hours. When ready, bake as directed, adding a few extra minutes if needed to heat through.
How Should I Store Leftovers?
Store leftovers in an airtight container in the fridge for 3-4 days. Reheat gently in the oven or microwave until warmed through.
What Can I Substitute for Black Olives?
If you’re not a fan of black olives, feel free to omit them or swap in sliced green olives or chopped jalapeños for a little extra kick.
