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Keto Chicken Alfredo Casserole

This rich and creamy Keto Chicken Alfredo Casserole brings comfort food back to the keto table. With tender chicken, crisp broccoli, and a velvety Parmesan sauce, it's simple, satisfying, and perfect for weeknight dinners or meal prep.
5 from 1 vote
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Dinner, Main Course
Cuisine American, keto
Servings 4
Calories 395 kcal

Ingredients
  

  • 1 lb boneless skinless chicken breasts, cut into bite-sized pieces
  • 1 cup heavy cream room temperature
  • 1 cup Parmesan cheese freshly grated
  • 2 cups broccoli florets cut into bite-sized pieces
  • 1 tsp garlic powder or substitute with fresh minced garlic
  • Salt and pepper to taste
  • Butter or high-heat oil for greasing the baking dish

Instructions
 

  • Preheat oven to 375°F (190°C) and grease a 9x13-inch casserole dish.
  • Cook chicken: Season chicken with salt and pepper. In a skillet over medium-high heat, cook until no longer pink, about 5–7 minutes. Remove from pan and set aside.
  • Blanch broccoli: Boil florets for 2 minutes, drain, and rinse with cold water to stop cooking.
  • Make Alfredo sauce: In the same skillet, bring heavy cream to a simmer over medium-low heat. Gradually whisk in Parmesan until melted. Add garlic powder, salt, and pepper. Stir until slightly thickened, 3–5 minutes.
  • Assemble casserole: Layer chicken and broccoli in the prepared dish. Pour sauce over the top, making sure all ingredients are coated.
  • Bake for 15–20 minutes, or until bubbling and golden on top. Optional: broil for 2 minutes for a more browned top.
  • Rest for 5 minutes before serving.

Notes

To make ahead, assemble and refrigerate up to 24 hours before baking.
Store leftovers in the fridge for up to 3 days or freeze for up to 1 month (reheat gently).
Swap chicken for turkey or shrimp, or add herbs like thyme or rosemary for flavor variety.
For extra stretchiness, add mozzarella to the cheese mix.
Keyword chicken Alfredo, keto casserole
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