Keto Jalapeño Chicken Casserole

By Lily | Last modified on Mar 6, 2026

Featured in: Main Dishes

If you crave a spicy, creamy comfort dish that fits perfectly into a keto lifestyle, this Keto Jalapeño Chicken Casserole is an absolute winner. Combining tender shredded chicken with cheesy goodness and the subtle heat of fresh jalapeños, it’s a fulfilling dinner that satisfies bold flavor cravings without the carbs.

The blend of cauliflower rice with rich cream cheese and smoky bacon adds fantastic texture and depth, making this casserole a cozy, crowd-pleasing meal for weeknights or meal prep alike.

Why You’ll Love This Recipe

Low carb and gluten-free, ideal for keto or paleo diets.
Simple ingredients you likely have on hand or can easily find.
The perfect balance of creamy, cheesy, smoky, and spicy flavors.
Quick to prep and bakes to bubbly golden perfection.

Ingredients

Cooked chicken breast (3 cups): Shredded or diced, provides lean, high-quality protein for this hearty casserole.
Cream cheese (8 oz): Softened for easy mixing, adds luxurious creaminess to the sauce base.
Sour cream (1 cup): Enhances creaminess and adds subtle tang, blending well with cheeses and spices.
Shredded cheddar cheese (2 cups, divided): Sharp cheddar contributes rich flavor; divided use allows for melting inside and a crispy topping.
Shredded mozzarella cheese (1 cup): Offers gooey, stretchy texture that melds beautifully with other cheeses.
Bacon slices (6, cooked and crumbled): Adds smoky crunch and savory depth; half mixed in, half for topping.
Cauliflower rice (4 cups): Fresh or frozen, sautéed to soften as a low-carb substitute for traditional rice or grains.
Jalapeños (4-5, seeded and diced): Adds bright, fresh heat without overpowering the dish; extra slices used for garnish.
Garlic (2 cloves, minced): Infuses aromatic flavor that complements the spicy jalapeños and smoky bacon.
Green onions (1/4 cup, sliced): Provides fresh oniony bite and color contrast, used both inside and for garnish.
Smoked paprika (1/2 teaspoon): Imparts subtle smoky warmth enhancing the overall layered flavors.
Onion powder (1/2 teaspoon): Adds mild savory depth without overpowering the fresh ingredients.
Salt and black pepper (1/2 teaspoon each): Enhances all flavors and balances the creamy, spicy components.
Oil for cooking: Used to sauté cauliflower rice and lightly grease the baking dish to prevent sticking.

Instructions

Prepare Baking Dish and Oven: Preheat your oven to 375°F to ensure it’s ready once the casserole is assembled. Lightly grease a 9×13-inch baking dish with cooking oil or spray to prevent the casserole from sticking during baking.
Soften Cauliflower Rice: Heat a drizzle of oil in a large skillet over medium heat. Add the cauliflower rice and sauté for 5 to 7 minutes, stirring occasionally, until softened but not mushy. This step cooks out excess moisture and improves texture in the final bake.
Prepare Cheese Mixture: In a large mixing bowl, combine softened cream cheese, sour cream, 1 cup of cheddar cheese, shredded mozzarella, smoked paprika, onion powder, salt, and black pepper. Mix thoroughly until smooth and creamy to create a rich base for the casserole filling.
Combine Filling Ingredients: Fold the cooked chicken, sautéed cauliflower rice, diced jalapeños, minced garlic, half of the crumbled bacon, and half the green onions into the cheese mixture. This ensures all components are evenly incorporated for consistent flavor in every bite.
Assemble the Casserole: Spread the combined mixture evenly into the prepared baking dish. Sprinkle the remaining cheddar cheese on top, followed by the rest of the bacon to add a crispy, flavorful crust as it bakes.
Bake Until Bubbly: Bake the casserole in the preheated oven for 25 to 30 minutes until it’s hot, bubbly, and golden on top. This baking melds the flavors perfectly and creates a satisfying texture contrast.
Garnish and Serve: Remove the casserole from the oven and garnish with extra jalapeño slices and the remaining green onions. These fresh toppings add visual appeal and a bright, spicy finish to each serving.

You Must Know

You can adjust the number of jalapeños to control the spice level to your preference.
Using cooked chicken breast ahead of time makes this dish convenient for meal prep.
If you prefer less heat, omit the jalapeño seeds or substitute with milder peppers.

Storage Tips

Store leftovers covered in the refrigerator for up to 3 days. Reheat in the oven or microwave until warmed through, maintaining the creamy texture.

Serving Suggestions

Pair this casserole with a fresh green salad or steamed low-carb vegetables to keep the meal balanced. It also goes well with a dollop of guacamole or a squeeze of fresh lime to enhance the flavors.

Professional Tips

For extra smoky flavor, try adding a dash of chipotle powder or smoked sea salt.
Make sure the cream cheese is softened to room temperature to mix smoothly without lumps.
To save time, use pre-cooked rotisserie chicken and pre-riced cauliflower from the store.

FAQs

Can I use frozen cauliflower rice?: Yes, frozen cauliflower rice works well. Just thaw and drain any excess moisture before sautéing to avoid sogginess.
What can I substitute for cream cheese?: You can substitute cream cheese with an equal amount of full-fat Greek yogurt for a lighter version, although the texture and richness will change slightly.
Is this dish suitable for meal prep?: Absolutely! This casserole stores and reheats well, making it perfect for preparing several meals in advance.
Can I make this casserole spicier?: Yes, add more jalapeños, include some seeded portions, or top with hot sauce for an extra kick.
How do I prevent the casserole from becoming watery?: Make sure to sauté cauliflower rice well to reduce moisture and avoid watery results during baking.
Can I add other vegetables?: Yes, finely chopped bell peppers or spinach can be added for extra nutrition and color, just reduce cauliflower rice slightly to maintain volume.
What cheese works best?: Cheddar and mozzarella provide a good balance of sharpness and meltability, but feel free to experiment with Monterey Jack or pepper jack for added flavor.