Chicken pizza casserole is an easy casserole the entire family will enjoy. Make this low-carb pizza-inspired meal in your slow cooker or Instant Pot.

Slow Cooker/Instant Pot Chicken Pizza Casserole (Low-Carb, Keto)

  • Author: Fit SlowCooker Queen
  • Prep Time: 10 minutes
  • Cook Time: 3 hours
  • Total Time: 3 hours 10 minutes
  • Yield: Serves 4 1x


  • 2 lbs boneless, skinless chicken breasts, cut into 1-inch pieces
  • 1 cup diced tomatoes,
  • 4 ounces sausage, cooked
  • 2 ounces pepperoni
  • 1 tsp garlic salt
  • 1/2 tsp dried basil
  • 1/4 tsp onion powder
  • Pepper to taste
  • 2 cups mozzarella, shredded
  • 2 tsp oil + 1/4 cup low-sodium chicken broth or water (for IP)


Slow Cooker

  1. Spray slow cooker with cooking spray.
  2. Add chicken to the bottom of the slow cooker. Add diced tomatoes on top.
  3. Sprinkle evenly with with garlic salt, basil, onion powder and pepper.
  4. Add mozzarella cheese evenly across top. Add sausage & pepperoni.
  5. Cook HIGH 2-3 hours or low 4-6 (make sure internal temperature for the chicken is 165° Fahrenheit).

Instant Pot

  1. Turn the Instant Pot to saute. Season chicken with garlic salt, basil, onion powder, and pepper. Once the IP is hot, add the oil & chicken and cook a few minutes on each side until slightly browned.
  2. Add diced tomatoes and broth (or water) to the IP.
  3. Close lid and seal valve. Set high pressure and cook for 8 minutes (make sure internal temperature for the chicken is 165° Fahrenheit). Quick release pressure.
  4. Top with shredded mozzarella cheese, pre-cooked sausage, and pepperoni. Cook on warm until cheese is melted.


Nutritional facts calculated using sausage & pepperoni