Easy Low Carb Chicken Casserole

This easy low carb chicken casserole is the ultimate comfort food with a healthy twist. It’s rich, creamy, flavorful, and surprisingly simple to prepare. Designed for those who want a satisfying meal without the carbs, this dish uses a base of juicy, seasoned chicken breasts smothered in a creamy, cheesy sauce. Finished with bacon bits and scallions for texture and flavor, this casserole hits all the right notes for a cozy and filling dinner.

Ideal for weeknights or meal prep, this casserole delivers big flavor with minimal effort. The chicken is seared for extra juiciness, then coated in a tangy, spiced sauce made from mayonnaise, sour cream, Dijon mustard, garlic, and cheddar cheese. A handful of seasonings such as thyme, paprika, and cayenne adds just the right kick to keep things interesting, while a crunchy topping of bacon and scallions provides a welcome contrast.

This casserole fits perfectly into keto and low carb lifestyles but is so flavorful that even those not watching their carbs will love it. It’s a fantastic way to enjoy comfort food that doesn’t weigh you down.

Why You’ll Love This Recipe

1. Low Carb and Keto-Friendly: Great for low carb diets without sacrificing taste.
2. Quick and Easy: Minimal prep and hands-off baking time.
3. Creamy and Flavorful: Rich sauce with a hint of spice and plenty of cheese.
4. Perfect for Meal Prep: Reheats well and makes great leftovers.
5. Family-Friendly: Appealing to both low-carb eaters and everyone else.

Ingredients

Chicken

• Boneless, skinless chicken breasts
• Avocado oil spray
• Kosher salt
• Black pepper

Sauce

• Mayonnaise
• Sour cream
• Dijon mustard
• Fresh garlic, minced
• Kosher salt
• Black pepper
• Dried thyme
• Paprika
• Cayenne pepper
• Cheddar cheese, shredded

Topping

• Scallions, sliced (green parts only)
• Bacon bits, room temperature

Variations

Use Chicken Thighs

Swap breasts for boneless thighs for extra juiciness and flavor.

Add Vegetables

Incorporate low-carb veggies like broccoli, spinach, or mushrooms.

Spice It Up

Increase cayenne or add chopped jalapeños for more heat.

Dairy-Free Version

Use dairy-free cheese, mayo, and sour cream alternatives for a dairy-free option.

Swap Cheeses

Try mozzarella, pepper jack, or a blend for different cheese flavors.

How to Make the Recipe

Step 1

Preheat oven to 375°F (190°C). Lightly grease a baking dish with avocado oil spray.

Step 2

Season chicken breasts with salt and pepper. Sear in a skillet over medium-high heat for 2–3 minutes per side until lightly browned (optional but recommended).

Step 3

Place chicken breasts in the prepared baking dish.

Step 4

In a bowl, mix together mayonnaise, sour cream, Dijon mustard, garlic, salt, pepper, thyme, paprika, cayenne, and half of the shredded cheddar.

Step 5

Spread the sauce mixture evenly over the chicken.

Step 6

Top with remaining cheddar cheese.

Step 7

Bake uncovered for 25–30 minutes, or until chicken reaches 165°F (74°C) internally and the cheese is melted and bubbly.

Step 8

Remove from oven and sprinkle with bacon bits and scallions before serving.

Tips for Making the Recipe

• Searing the chicken first adds flavor and locks in moisture.
• Use a meat thermometer to avoid overcooking.
• Don’t skip the topping—bacon and scallions add crucial flavor and crunch.
• Let it rest for 5 minutes before serving for best texture.
• Make the sauce in advance to save time during dinner prep.

How to Serve

Serve this casserole with a side of leafy greens, steamed vegetables, or cauliflower rice for a complete low carb meal. It also pairs well with zucchini noodles or roasted asparagus.

Make Ahead and Storage

Storing Leftovers

Cool completely and store in an airtight container in the refrigerator for up to 4 days.

Freezing

Freeze individual portions in airtight containers for up to 3 months. Thaw overnight in the fridge before reheating.

Reheating

Reheat in the oven at 350°F (175°C) or in the microwave until warmed through. Add a splash of cream or broth if needed to maintain moisture.

FAQs

1. Can I use rotisserie chicken instead of raw chicken breasts?

Yes, shred rotisserie chicken and bake for only 15–20 minutes since it’s already cooked.

2. Is this recipe spicy?

It has a mild kick from cayenne, which you can adjust to taste.

3. Can I use Greek yogurt instead of sour cream?

Yes, it’s a great substitute for a similar texture with fewer calories.

4. What type of cheese works best?

Sharp cheddar offers bold flavor, but feel free to try a mix like Monterey Jack or gouda.

5. Can I make this ahead of time?

Yes, assemble the casserole up to a day in advance and refrigerate before baking.

6. What vegetables can I add?

Low-carb veggies like spinach, broccoli, or zucchini work well and add texture.

7. Is this casserole gluten-free?

Yes, all the ingredients are naturally gluten-free.

8. Can I double the recipe for a crowd?

Absolutely—use a larger baking dish and adjust cooking time slightly.

9. What’s the best way to tell when the chicken is done?

Use a meat thermometer to check that it reaches 165°F (74°C) internally.

10. Can I omit the bacon?

Yes, but the bacon adds extra flavor and crunch; consider replacing it with toasted nuts or seeds for texture.

Conclusion

This easy low carb chicken casserole is a delicious way to enjoy a creamy, hearty meal without the extra carbs. With juicy chicken, a rich, tangy sauce, and a satisfying cheesy topping, it’s both comforting and wholesome. Whether you’re following a keto diet or simply looking for a quick and flavorful dinner, this casserole delivers every time. Make it once, and it’s bound to become a staple in your weekly meal rotation.

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