This Easy Low Carb Chicken Casserole is a simple and satisfying dish packed with tender chicken, melty cheese, and just the right mix of creamy and crunchy textures. It’s perfect when you want a comforting meal without all the carbs, making it a great choice for anyone watching their carb intake but still craving something tasty and filling.
I love making this casserole because it comes together quickly and doesn’t require a lot of fancy ingredients. One of my favorite things about it is how versatile it is—you can easily add veggies like broccoli or mushrooms, or swap in your favorite cheese. I usually double the recipe because it tastes even better as leftovers the next day!
When I serve this dish, I like to keep it simple with a fresh green salad or some steamed veggies on the side. It’s the kind of meal that feels like a warm hug and always makes everyone at the table happy. Plus, it’s a great option for busy weeknights when you want something healthy but easy to prepare.
Key Ingredients & Substitutions
Chicken breasts: Chicken gives the casserole its hearty protein punch. You can swap with boneless thighs if you prefer juicier meat. Pre-cooked chicken is a time saver too!
Bell peppers and onion: These veggies add freshness and color. Feel free to switch peppers for zucchini, mushrooms, or broccoli for variety or what you have on hand.
Cheese and sour cream: The combo of cheddar, mozzarella, Parmesan, and sour cream makes the bake creamy and cheesy. Use Greek yogurt instead of sour cream for a lighter touch, and any melty cheese you like works well.
Mayonnaise: Adds richness to the mix. You can use plain yogurt or extra sour cream if you want to avoid mayo.
Spices: Paprika, oregano, parsley, salt, and pepper bring flavor without carbs. Fresh herbs can be used instead of dried for a brighter taste.
How Do You Get a Golden, Melty Cheese Topping?
That beautiful golden crust is what makes this casserole so inviting. Here’s how to nail it every time:
- Use a mix of cheeses like cheddar, mozzarella, and Parmesan. They melt differently to give a great texture.
- Sprinkle cheese evenly on top to ensure it browns nicely without burning.
- Bake uncovered so moisture escapes, helping the cheese to crisp up.
- For an extra golden top, switch your oven to broil for the last 2-3 minutes—keep a close eye to avoid burning!
Let the dish rest for a few minutes after baking. This helps the cheese set a bit so each slice holds together well.
Equipment You’ll Need
- 9×13-inch casserole dish – perfect size for this recipe and lets the casserole bake evenly.
- Large skillet – for cooking the chicken and sautéing the veggies in one pan.
- Mixing bowl – to combine all the ingredients without making a mess.
- Measuring cups and spoons – to keep seasoning and ingredients balanced.
- Spatula or wooden spoon – helps stir everything together gently and scrape the bowl clean.
Flavor Variations & Add-Ins
- Swap chicken for cooked sausage or ground turkey for a different flavor and protein twist.
- Add chopped broccoli or spinach to sneak in extra veggies and boost nutrition.
- Use pepper jack cheese for a spicy kick instead of cheddar.
- Mix in chopped jalapeños or a dash of cayenne for heat if you like it spicy.
Easy Low Carb Chicken Casserole
Ingredients You’ll Need:
For the Chicken and Veggies:
- 2 lbs boneless, skinless chicken breasts, diced
- 1 cup diced red bell pepper
- 1 cup diced green bell pepper
- 1/2 cup chopped onion
- 2 cloves garlic, minced
- 1 tablespoon olive oil
For the Creamy Mix:
- 1 cup sour cream
- 1/2 cup mayonnaise
- 1 teaspoon paprika
- 1 teaspoon dried oregano
- 1 teaspoon dried parsley (plus extra for garnish)
- Salt and pepper to taste
For the Cheese Topping:
- 1 cup shredded cheddar cheese
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
How Much Time Will You Need?
This casserole takes about 15 minutes to prepare and about 20-25 minutes to bake. Plan for a few minutes of resting time after baking, so around 40 minutes total from start to serving!
Step-by-Step Instructions:
1. Prepare and Cook the Chicken:
Preheat your oven to 375°F (190°C). Heat the olive oil in a large skillet over medium heat. Add the diced chicken and cook until it’s browned and fully cooked, which should take about 6 to 8 minutes. Once done, remove the chicken and set it aside.
2. Sauté the Vegetables:
In the same skillet, add the chopped onion, red and green bell peppers, and the minced garlic. Cook, stirring occasionally, until the vegetables become soft and tender—about 4 to 5 minutes.
3. Mix Everything Together:
In a large mixing bowl, combine the cooked chicken and sautéed veggies with sour cream, mayonnaise, paprika, oregano, parsley, salt, and pepper. Stir everything well so it’s fully blended.
4. Assemble the Casserole:
Grease a 9×13-inch casserole dish. Pour the mixture into the dish and spread it evenly. Then sprinkle the shredded cheddar, mozzarella, and Parmesan cheeses evenly over the top.
5. Bake and Serve:
Bake uncovered for 20-25 minutes or until the cheese is melted, bubbly, and golden brown on top. Take it out, let it rest for 5 minutes, then sprinkle some extra parsley for garnish if you like. Serve warm and enjoy your delicious low carb chicken casserole!
Can I Use Frozen Chicken in This Casserole?
Yes, you can! Just be sure to thaw the chicken fully before dicing and cooking. Thaw it safely in the fridge overnight or use the cold water method for quicker thawing.
Can I Add More Vegetables?
Absolutely! Feel free to add low-carb veggies like broccoli, spinach, or mushrooms. Just sauté them along with the bell peppers and onions before mixing everything together.
How Should I Store Leftovers?
Store leftovers in an airtight container in the fridge for up to 3 days. To reheat, warm in the oven or microwave until heated through. Adding a splash of cream or broth can help keep it moist.
Can I Make This Casserole Ahead of Time?
Yes! Prep the mixture, assemble the casserole, and cover it tightly with foil. Keep it refrigerated and bake within 24 hours for the best taste and texture.
