This creamy keto chicken bake is a low carb casserole loaded with tender chicken, rich cheese sauce, and no noodles. Perfect for easy weeknight dinners!

Ingredients

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Instructions

Step 1

Preheat your oven to 375°F (190°C). While the oven heats, prepare the chicken. Pat the chicken breasts dry with paper towels – this step is crucial because excess moisture can steam the chicken instead of searing it, preventing that beautiful golden-brown crust. Season both sides generously with salt, black pepper, garlic powder, onion powder, and paprika. The paprika not only adds a mild smoky flavor but also gives the chicken a rich color. Let the seasoned chicken rest for 5 minutes at room temperature to allow the spices to adhere and the meat to come up slightly in temperature for more even cooking.

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Step 2

Heat 2 tablespoons of olive oil in a large oven-safe skillet (preferably cast iron or stainless steel) over medium-high heat. You want the oil shimmering but not smoking. Carefully place the chicken breasts in the skillet in a single layer – do not overcrowd; if necessary, sear in batches. Cook for 4-5 minutes per side until deeply golden brown. The chicken does not need to be cooked through at this point; you are building flavor through the Maillard reaction, which creates savory, complex notes. Use tongs to flip the chicken; avoid piercing the meat to keep juices inside. Once seared, transfer the chicken to a plate and set aside.

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Step 3

Reduce the heat to medium. In the same skillet (do not wipe it clean – those browned bits are packed with flavor), add the softened cream cheese. Break it up with a wooden spoon and stir constantly for 1 minute as it melts. Slowly pour in the chicken broth while whisking vigorously to incorporate any browned bits from the bottom of the pan. This technique is called deglazing and it ensures no flavor is wasted. Add the heavy cream, Dijon mustard, dried thyme, and dried rosemary. Continue whisking until the sauce is smooth and slightly thickened, about 2-3 minutes. Taste and adjust seasoning with salt and pepper if needed.

Step 4

Return the seared chicken breasts to the skillet, nestling them into the creamy sauce. Spoon some of the sauce over the tops of the chicken to keep them moist during baking. Sprinkle the shredded cheddar, mozzarella, and grated Parmesan evenly over the chicken and sauce. The combination of cheeses creates a gooey, bubbly crust – cheddar for sharpness, mozzarella for stretch, and Parmesan for nutty depth. Transfer the skillet to the preheated oven.

Step 5

Bake for 20-25 minutes, or until the chicken is cooked through (internal temperature reaches 165°F / 74°C) and the cheese is melted and golden brown. If you prefer a deeper golden crust, switch the oven to broil for the last 2-3 minutes, watching carefully to prevent burning. Let the casserole rest for 5 minutes after removing from the oven – this allows the sauce to thicken slightly and makes serving easier. Garnish with fresh chopped parsley for a pop of color and freshness.

For best results

  • For the creamiest sauce, ensure your cream cheese is fully softened to room temperature. Cold cream cheese will clump and result in a lumpy sauce. If you forgot to take it out of the fridge, cut it into small cubes and microwave on low power for 10-second intervals until soft but not melted. Also, whisk the cream cheese into the broth gradually to create a smooth emulsion.
  • To prevent the chicken from drying out, don't skip the searing step. Searing locks in moisture and adds flavor. Also, use a meat thermometer to check doneness – overcooked chicken becomes tough and stringy. Remove the casserole from the oven as soon as the internal temperature hits 165°F.
  • This casserole is naturally low in carbs, but if you want to add vegetables for extra nutrients and fiber, consider stirring in 2 cups of steamed broccoli florets or sautéed mushrooms before baking. Just be sure to pat them dry to avoid watering down the sauce. This addition will increase the carb count slightly, but it remains keto-friendly if you keep portion sizes in check.
  • Make-ahead tip: You can assemble the entire casserole (without baking) up to 24 hours in advance. Cover and refrigerate. When ready to bake, add 10-15 minutes to the baking time since the dish starts cold. Alternatively, you can freeze the unbaked casserole for up to 3 months. Thaw overnight in the refrigerator before baking.
  • For a dairy-free version, substitute the cream cheese with a dairy-free cream cheese alternative, use full-fat coconut cream instead of heavy cream, and choose dairy-free shredded cheese. Note that the texture may be slightly less creamy, but still delicious. Also, check that your Dijon mustard is dairy-free (most are).
  • If you prefer a thicker sauce, you can stir in 1/2 teaspoon of xanthan gum or 1 tablespoon of cream cheese mixed with 1 tablespoon of water (slurry) after deglazing. This is especially helpful if you plan to reheat leftovers, as the sauce may thin out. Whisk the slurry into the simmering sauce and cook for 1 minute until thickened.

Variations

  • Chicken Thigh Version: For juicier, more flavorful meat, substitute boneless skinless chicken thighs. They have a higher fat content, which keeps them moist even with longer cooking. Adjust the cooking time by 5-10 minutes, as thighs may take slightly longer to reach 165°F. You can also use bone-in thighs, but increase baking time to 30-35 minutes.
  • Spicy Southwest Twist: Add 1 teaspoon of chili powder, 1/2 teaspoon of cumin, and a pinch of cayenne pepper to the seasoning blend. Stir in 1/2 cup of diced green chiles and 1/4 cup of chopped cilantro into the sauce before baking. Top with pepper jack cheese instead of cheddar for a spicy kick. Serve with sliced avocado and a dollop of sour cream.
  • Mushroom and Spinach: Sauté 8 oz sliced cremini mushrooms in the skillet after searing the chicken, until golden and moisture evaporates. Then proceed with the sauce. In the last 5 minutes of baking, stir in 2 cups of fresh spinach until wilted. This adds earthy flavors and extra nutrients without compromising the low-carb profile.
  • Bacon and Ranch: Cook 6 slices of bacon until crispy, then crumble. Use 1 tablespoon of the rendered bacon fat instead of olive oil for searing the chicken. Stir 1 packet of ranch seasoning mix into the sauce. Sprinkle the crumbled bacon over the casserole before baking. This variation is indulgent and packed with savory, tangy flavors.
  • Pesto Chicken Bake: Swap the Dijon mustard and dried herbs for 1/4 cup of basil pesto. Reduce the cream cheese to 6 oz and the heavy cream to 1/3 cup, as pesto adds richness. Top with shredded mozzarella and bake as directed. Garnish with fresh basil leaves. This version is vibrant and perfect for summer.

Nutrition

  • Calories385 kcal
  • Total Fat24g
  • Saturated Fat12g
  • Cholesterol145mg
  • Sodium620mg
  • Total Carbohydrates7g
  • Dietary Fiber1g
  • Sugars3g
  • Protein36g

Common Questions

Can I use frozen chicken breasts?
Yes, but you must thaw them completely in the refrigerator first. Frozen chicken will release too much water during cooking, resulting in a watery sauce and unevenly cooked meat. Pat the thawed chicken dry thoroughly before seasoning and searing. If you’re short on time, you can use thin-sliced chicken cutlets, which cook faster and can go from frozen to skillet with a longer sear time, but for best results, thaw first.
How do I store leftovers and how long do they last?
Store leftovers in an airtight container in the refrigerator for up to 4 days. The sauce may thicken as it cools; when reheating, add a splash of chicken broth or heavy cream to restore the creamy consistency. Reheat in the microwave in 30-second intervals, stirring between, or in a covered skillet over low heat. Freezing is also possible – freeze in a freezer-safe container for up to 3 months. Thaw overnight in the fridge before reheating.
Is this recipe keto-friendly? What are the net carbs?
Yes, this recipe is keto-friendly. Each serving contains approximately 6g net carbs (total carbs minus fiber and sugar alcohols). The primary carbs come from the cream cheese and heavy cream, which are low in carbs. To reduce carbs further, you can omit the onion powder and garlic powder (though they add minimal carbs) or use a sugar-free Dijon mustard. Always check labels for hidden sugars.
Can I make this casserole dairy-free?
Absolutely. Use dairy-free cream cheese (such as Kite Hill or Tofutti), full-fat coconut cream instead of heavy cream, and dairy-free shredded cheese (like Daiya or Violife). The flavor and texture will be slightly different, but still creamy and delicious. Be aware that coconut cream may impart a subtle coconut flavor, which pairs well with the chicken and herbs. Also, ensure your Dijon mustard is dairy-free.
What can I serve with this casserole to keep it low carb?
This casserole is quite filling on its own, but if you want sides, consider steamed broccoli, roasted cauliflower, a simple green salad with vinaigrette, or zucchini noodles (zoodles) sautéed in garlic butter. For a heartier meal, serve with cauliflower rice or roasted asparagus. These sides complement the creamy sauce without adding many carbs.
Why did my sauce turn out lumpy?
Lumpy sauce usually results from adding cold cream cheese directly to the hot pan. Always soften the cream cheese to room temperature before adding. If lumps do form, you can try whisking vigorously or using an immersion blender to smooth it out. Another reason could be adding the cream too quickly – pour liquids slowly while whisking constantly to maintain a smooth emulsion.
Can I add vegetables to this casserole?
Yes! Vegetables like broccoli, cauliflower, spinach, mushrooms, bell peppers, or zucchini work well. If using watery vegetables like zucchini, sauté them first to remove excess moisture, then stir into the sauce before baking. Add sturdy vegetables like broccoli or cauliflower in the last 10 minutes of baking to prevent them from becoming mushy. This will slightly increase the carb count, but you can adjust portion sizes accordingly.