Keto Creamy Onion Chicken Bake is an easy low-carb dinner made with tender baked chicken and a rich creamy onion sauce. This keto chicken casserole delivers deep savory flavor with no pasta, rice, or flour and is perfect for cozy weeknight meals and meal prep.

About This Recipe

Keto Creamy Onion Chicken Bake is designed to bring classic comfort food flavor into a keto-friendly, oven-baked dinner. Inspired by traditional creamy onion chicken casseroles, this recipe focuses on soft, savory onions and a rich cream sauce paired with juicy baked chicken—without relying on flour, starch, or high-carb fillers.

The onions are gently cooked until soft and sweet, forming the flavor base of the dish. As they bake with the chicken, they continue to release natural sweetness that balances the richness of the cream. Chicken breasts stay moist in the oven thanks to the thick sauce that coats them throughout the baking process.

Instead of flour-based sauces, this recipe uses cream cheese and heavy cream to create a smooth, velvety consistency that holds up well in the oven. The sauce thickens naturally as it bakes, clinging to the chicken rather than becoming watery. Simple seasoning keeps the focus on the onion flavor, making the dish familiar and comforting without being heavy.

This chicken bake is ideal for weeknight dinners, family meals, and leftovers. It reheats well, maintains its creamy texture, and works perfectly as a make-ahead keto dinner. Whether served on its own or paired with a simple low-carb side, this creamy onion chicken bake delivers satisfying comfort food flavor while staying fully keto.

Why You’ll Love This Recipe

Creamy baked chicken without flour
Rich onion flavor
Oven-baked, hands-off cooking
Keto and low-carb friendly
Great for meal prep
Reheats without drying out
Classic comfort food feel

Ingredients

1½ lb boneless, skinless chicken breasts
1 tbsp olive oil
1 tsp salt
½ tsp black pepper
1 tsp onion powder
1 large yellow onion, thinly sliced
¾ cup heavy cream
4 oz cream cheese, cubed
½ cup chicken broth
½ tsp dried thyme

Instructions

Preheat oven to 375°F.
Heat olive oil in a skillet over medium heat. Add sliced onion and cook for 8–10 minutes until soft and lightly golden.
Add chicken broth to the skillet and simmer for 2 minutes.
Stir in cream cheese until melted and smooth, then add heavy cream, salt, black pepper, onion powder, and thyme.
Place chicken breasts in a baking dish and pour the onion cream sauce over the top.
Cover with foil and bake for 25 minutes.
Remove foil and bake for an additional 10–15 minutes until chicken is cooked through and sauce is thick.
Remove from oven and rest for 5 minutes before serving.

Nutrition (per serving)

Calories: ~510
Fat: ~38 g
Protein: ~36 g
Net Carbs: ~5 g

FAQ

Can I use chicken thighs instead of breasts?
Yes, thighs work very well and stay extra juicy.
Is this dish cheesy?
No, it’s creamy but not cheesy in flavor.
Does this reheat well?
Yes, reheat gently to keep the sauce smooth.
Can I make this ahead of time?
Yes, assemble and bake when ready, or bake fully and reheat.

Variations & Substitutions

Add mushrooms to the onion sauce
Use fresh thyme instead of dried
Add garlic for extra depth
Use bone-in chicken (adjust cook time)

Serving Suggestions

Serve with cauliflower mash
Pair with roasted broccoli
Enjoy on its own

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