This creamy high-protein chicken casserole is a quick dinner hero, loaded with tender chicken, cream cheese, and cheddar for a rich, satisfying meal. With 35g protein and 15 min prep,…

Ingredients

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Instructions

Step 1

Preheat your oven to 375°F (190°C). While the oven is heating, grease a 9×13-inch baking dish or a 10-inch cast iron skillet with butter or non-stick spray. Using a cast iron skillet not only adds rustic charm but also retains heat beautifully, ensuring your casserole stays hot at the table. The preheating step is crucial: a properly preheated oven ensures even cooking and helps the cheese develop that irresistible golden crust without drying out the chicken.

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Step 2

In a large mixing bowl, combine the softened cream cheese, heavy cream, minced garlic, Italian seasoning, salt, and pepper. Use an electric hand mixer or a sturdy whisk to blend until the mixture is completely smooth and lump-free. The cream cheese must be at room temperature—if it’s too cold, it will create a grainy sauce. You want a velvety, thick base that will coat every piece of chicken. Taste the sauce at this point and adjust seasoning if needed; the flavors will mellow as it bakes, so a bit more salt or garlic is okay.

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Step 3

Add the cooked chicken to the sauce and stir until every piece is evenly coated. For the best texture, use chicken that is still warm (not hot) so the sauce clings better. If you’re using leftover rotisserie chicken, shred it into bite-sized chunks—this adds more surface area for the sauce to adhere to. Fold in 1 1/2 cups of the shredded cheddar cheese and all the Parmesan cheese. Reserve the remaining 1/2 cup cheddar for the topping. The Parmesan adds a salty, nutty depth that complements the creaminess.

Step 4

Transfer the mixture to the prepared baking dish or skillet, spreading it into an even layer. Sprinkle the reserved cheddar cheese evenly over the top. Drizzle the melted butter over the cheese—this helps create a beautifully browned, crispy crust during baking. For an extra touch, you can add a light dusting of paprika or extra Italian seasoning on top. Place the dish in the preheated oven and bake for 20-25 minutes, or until the casserole is bubbly around the edges and the cheese on top is melted and golden brown.

Step 5

Remove from the oven and let it rest for 5 minutes before serving. This resting period allows the sauce to thicken slightly, making it easier to serve. Garnish with fresh chopped parsley for a pop of color and freshness. Serve hot, alongside steamed broccoli or a crisp green salad to keep the meal low-carb. The casserole is rich and satisfying on its own, but a side of roasted vegetables or cauliflower rice would also be excellent. Store leftovers in an airtight container in the refrigerator for up to 4 days.

For best results

  • For the creamiest sauce, ensure your cream cheese is truly at room temperature. Take it out of the fridge at least 30 minutes before starting. If you're in a hurry, cut the cream cheese into small cubes and microwave it in 10-second bursts until soft but not melted. Overheating can cause the sauce to break and become grainy. Similarly, heavy cream should be at room temperature to blend smoothly with the cream cheese.
  • To save time on a busy weeknight, use pre-cooked chicken. Rotisserie chicken from the grocery store is a fantastic shortcut—just remove the skin and shred the meat. You'll need about 3-4 cups of shredded chicken. If you prefer to cook your own, poach the chicken breasts in salted water or broth with a bay leaf and peppercorns for 15-20 minutes until cooked through. Let them cool slightly before shredding.
  • This casserole is naturally low in carbs with only about 6 grams of net carbs per serving (depending on the exact ingredients). To keep it keto-friendly, use full-fat cream cheese and heavy cream. Avoid low-fat versions as they contain more carbs and won't provide the same rich texture. Also, check your Italian seasoning for added sugars or starches—pure dried herbs are best.
  • If you want a crispier top, switch the oven to broil for the last 2-3 minutes of baking. Keep a close eye to prevent burning. The butter and cheese will bubble and brown quickly, creating a beautiful crust. Alternatively, you can sprinkle pork rind crumbs or almond flour mixed with melted butter over the top before baking for a crunchy, low-carb topping.
  • This casserole freezes beautifully. Assemble the dish completely but do not bake it. Cover tightly with plastic wrap and then aluminum foil, and freeze for up to 3 months. When ready to bake, thaw overnight in the refrigerator and bake as directed, adding about 10 minutes to the cooking time since it starts cold. You can also freeze individual portions in airtight containers for quick lunches.
  • For a dairy-free or lower-calorie version, substitute the cream cheese with a dairy-free cream cheese alternative and the heavy cream with full-fat canned coconut milk (the creamy part). Use a dairy-free cheddar shreds on top. The flavor will be slightly different but still delicious. Note that coconut milk may impart a subtle coconut taste, so pair with bold seasonings like smoked paprika or chipotle powder.

Variations

  • **Broccoli Chicken Casserole**: Steam 2 cups of fresh broccoli florets until bright green and tender-crisp. Fold them into the creamy chicken mixture before baking. The broccoli adds color, fiber, and nutrients. If using frozen broccoli, thaw and pat dry to avoid excess water. This variation is perfect for sneaking in extra veggies.
  • **Spicy Buffalo Chicken Casserole**: Add 1/3 cup of buffalo sauce (like Frank's RedHot) to the cream sauce and reduce the heavy cream by 2 tablespoons. Use blue cheese crumbles instead of Parmesan, and top with extra blue cheese before baking. Serve with celery sticks on the side for a classic buffalo wing experience with a low-carb twist.
  • **Mushroom and Herb Chicken Casserole**: Sauté 8 oz of sliced cremini mushrooms in butter until golden and they release their liquid. Add the mushrooms along with 1 tsp dried thyme or rosemary to the chicken mixture. The earthy mushrooms complement the creamy sauce beautifully and add a meaty texture without extra carbs.
  • **Mexican Chicken Casserole**: Replace the Italian seasoning with 1 tbsp of taco seasoning, and add a 4 oz can of diced green chiles (drained). Use a blend of cheddar and Monterey Jack cheese. Top with sliced jalapeños before baking. Serve with sour cream and avocado slices for a fiesta of flavors.
  • **Pesto Chicken Casserole**: Stir 1/4 cup of basil pesto into the cream sauce. Reduce the Italian seasoning to 1 tsp. Use a combination of mozzarella and Parmesan for the topping. The pesto adds a bright, herby flavor that pairs wonderfully with the creamy base. Garnish with pine nuts for crunch.

Nutrition

  • Calories435 kcal
  • Total Fat33g
  • Saturated Fat19g
  • Cholesterol145mg
  • Sodium620mg
  • Total Carbohydrates7g
  • Dietary Fiber1g
  • Sugars3g
  • Protein35g

Common Questions

Can I use chicken thighs instead of chicken breasts?
Absolutely! Chicken thighs are juicier and more forgiving, making them a great choice for this casserole. They have a higher fat content which adds richness. Simply cook them until tender (boneless thighs take about 20 minutes at 375°F) and shred or chop. The cooking time for the casserole remains the same.
How do I store and reheat leftovers?
Store leftovers in an airtight container in the refrigerator for up to 4 days. To reheat, place a portion in a microwave-safe dish and microwave on medium power in 30-second intervals until hot, stirring once. Alternatively, reheat in a 350°F oven for about 10 minutes, covered with foil to prevent drying. The casserole can also be frozen for up to 3 months.
Is this casserole keto-friendly?
Yes, this casserole is keto-friendly with approximately 6 grams of net carbs per serving. The main sources of carbs are the cream cheese and heavy cream, which contain minimal lactose. To ensure it stays keto, avoid any low-fat dairy products as they often have added sugars. Pair it with low-carb vegetables like broccoli or cauliflower rice.
Can I make this casserole dairy-free?
Yes, you can make a dairy-free version by using dairy-free cream cheese and heavy cream alternatives. Look for brands like Kite Hill or Miyoko’s for cream cheese, and use full-fat canned coconut milk for the heavy cream. For the cheese topping, use a dairy-free shredded cheese blend. The texture may be slightly less creamy, but it will still be delicious.
What can I use instead of heavy cream?
If you don’t have heavy cream, you can substitute with a mixture of 3/4 cup whole milk and 1/4 cup melted unsalted butter. This mimics the fat content of heavy cream. For a lower-calorie option, use half-and-half, but note that the sauce will be thinner. Avoid using skim milk as it will make the sauce watery.
How can I add more vegetables to this casserole?
This casserole is very versatile. You can add up to 2 cups of low-carb vegetables like steamed broccoli, cauliflower florets, sautéed spinach, or zucchini. Just make sure to cook them first to remove excess moisture, otherwise the casserole may become watery. Chopped bell peppers or mushrooms also work well.
Can I prepare this casserole ahead of time?
Yes, you can assemble the casserole (without baking) up to 24 hours in advance. Cover and refrigerate. When ready to bake, let it sit at room temperature for 20 minutes, then bake as directed, adding about 5-10 minutes to the cooking time since it starts cold. This is great for meal prep or when entertaining.