Cheesy Keto Chicken Casserole

A simple one-dish meal, this keto chicken casserole is easy to assemble and practically bakes itself. It's the ultimate weeknight dinner!

Course Main Course

Cuisine American

Prep Time 10 minutes

Cook Time 30 minutes

Total Time 40 minutes

Servings servings

Calories 365kcal

Author Vered DeLeeuw

Ingredients

Chicken:

4 (8 oz) boneless skinless chicken breasts
Avocado oil spray
½ teaspoon Diamond Crystal kosher salt
¼ teaspoon black pepper

Sauce:

¼ cup avocado oil mayonnaise (⅓ cup for a creamier casserole)
¼ cup sour cream (⅓ cup for a creamier casserole)
1 tablespoon Dijon mustard
1 tablespoon minced fresh garlic
½ teaspoon Diamond Crystal kosher salt
¼ teaspoon black pepper
½ teaspoon dried thyme
½ teaspoon paprika
¼ teaspoon cayenne pepper
1 cup shredded sharp cheddar, divided

Topping:

¼ cup sliced scallions (green parts)
¼ cup bacon bits room temperature

Instructions

Preheat your oven to 450 degrees F. Line a baking dish with foil and grease the foil. Arrange the chicken breasts in the prepared pan. Spray them with oil and sprinkle with salt and pepper. Bake until cooked through, about 20 minutes.
Meanwhile, grease a 2-quart casserole dish. In a large bowl, mix together the mayonnaise, sour cream, Dijon mustard, minced garlic, salt, pepper, dried thyme, paprika, cayenne, and ½ cup of the shredded cheddar.
When the chicken is cooked, remove it from the oven but keep the oven on. Allow the chicken to slightly cool, until it’s easier to handle. Cut it into cubes or shred it. Add the chicken cubes to the bowl with the mayonnaise-sour cream mixture and toss to coat.
Transfer the mixture to the prepared casserole dish. Sprinkle with the remaining ½ cup of shredded cheddar. Bake until the cheese is melted, 5-10 minutes. If your casserole dish is broiler-safe, you can broil it instead, 6 inches below the broiler element (not directly below), for 30 seconds to 1 minute.
Sprinkle the casserole with sliced scallions and bacon bits. Serve immediately.

Video

Notes

If you'd like, you can very lightly steam small broccoli florets and mix them into the casserole before the final stage of baking, making it a complete meal. If you do, I suggest you increase the mayonnaise and sour cream to ⅓ cup each.

Nutrition