Low Carb Chicken Casserole is a comforting, hearty dish that’s perfect for anyone watching their carbs but still craving something filling and tasty. This casserole is packed with tender chicken, creamy cheese, and fresh veggies, all baked together into a warm, satisfying meal. The mix of textures, from the soft chicken to the melty cheese, makes every bite feel like a cozy hug.
I love making this casserole because it’s so easy to throw together on a busy weeknight, and it doesn’t sacrifice flavor just to be low carb. I usually add extra garlic and a sprinkle of my favorite herbs to give it a little punch, and it helps that it reheats beautifully, so leftovers are always a win. It’s definitely one of those dishes that feels like a little treat but keeps things healthy.
One of my favorite ways to enjoy this casserole is with a simple side salad or some steamed green beans to keep the meal light and fresh. It’s also a great recipe to bring to friends or family who are trying to cut down on carbs without losing out on comfort food. Every time I make it, I get compliments on how satisfying and delicious it is—even from folks who aren’t usually into low-carb meals!
Key Ingredients & Substitutions
Chicken Breast: Using cooked chicken breast keeps the casserole lean and low carb. Rotisserie chicken works great too, saving you time without losing flavor.
Broccoli: Fresh or frozen broccoli florets both work well. Just steam them lightly so they stay tender but not mushy. Cauliflower is a nice low-carb alternative.
Cheese: Cheddar adds great flavor and melts nicely. Mixing in mozzarella or Monterey Jack can make it creamier. Parmesan gives a salty, nutty kick. For dairy-free options, try plant-based cheeses, but expect a slight change in texture.
Sour Cream, Mayonnaise & Cream Cheese: These create the creamy base. Greek yogurt can replace sour cream for a lighter option. Use full-fat mayo for richness or swap for avocado mayo to keep it healthy.
Garlic & Italian Seasoning: Fresh garlic adds a nice punch, but garlic powder works in a pinch. Italian seasoning blends herbs that bring warmth — no need for fresh herbs if you don’t have them.
How Do I Get the Cheese Golden and Crispy on Top?
To get that perfect bubbly, golden top:
- Use a mix of cheeses with good melting qualities like cheddar and mozzarella.
- Sprinkle a final layer of cheese evenly over the casserole before baking.
- Bake uncovered so moisture can escape and the cheese browns rather than steams.
- For extra browning, turn on the broiler for 1-2 minutes at the end, but watch closely to prevent burning.
I usually rotate the pan halfway through baking to get even coloring. This simple step makes the top beautifully crisp without drying out the rest of the casserole.
Equipment You’ll Need
- 9×13-inch baking dish – It’s the perfect size to hold everything comfortably and bake evenly.
- Large mixing bowl – Ideal for mixing the creamy sauce and combining ingredients smoothly.
- Steamer or microwave-safe bowl – For lightly steaming the broccoli quickly and easily.
- Measuring cups and spoons – To ensure accurate quantities, especially for the seasonings and cheeses.
- Rubber spatula or mixing spoon – Helps stir and fold ingredients thoroughly without scratching your bowls or dish.
- Oven – For baking until bubbly and golden. Make sure it’s preheated for even cooking.
Flavor Variations & Add-Ins
- Swap chicken for cooked turkey or ham for different flavors or use cooked shrimp for a seafood twist.
- Mix in sautéed mushrooms, spinach, or zucchini for extra veggies and texture.
- Use a different cheese blend, like Monterey Jack or pepper Jack, for a more spicy or milder taste.
- Add a pinch of red pepper flakes or paprika to give it a little heat or smoky flavor.
Low Carb Chicken Casserole
Ingredients You’ll Need:
- 3 cups cooked chicken breast, diced or shredded
- 2 cups broccoli florets
- 1 cup shredded cheddar cheese (or a blend of cheddar and mozzarella)
- ½ cup grated Parmesan cheese
- 1 cup sour cream
- ½ cup mayonnaise
- ¼ cup cream cheese, softened
- 2 cloves garlic, minced
- 1 teaspoon dried Italian seasoning (or a mix of dried basil, oregano, and thyme)
- Salt and black pepper to taste
- 1 tablespoon olive oil (for sautéing)
- Fresh parsley or chives, chopped (optional for garnish)
How Much Time Will You Need?
This recipe takes about 15 minutes to prepare, including steaming the broccoli and mixing the ingredients. Baking time is around 25-30 minutes until the casserole is bubbly and golden on top. Overall, plan for about 45 minutes from start to finish.
Step-by-Step Instructions:
1. Preheat and Prepare the Broccoli:
Set your oven to 375°F (190°C) so it’s nicely heated by the time you’re ready to bake. Lightly steam or blanch the broccoli florets for 3-4 minutes until just tender. Drain well and set aside to cool.
2. Mix the Creamy Sauce:
In a large bowl, combine the sour cream, mayonnaise, softened cream cheese, minced garlic, Italian seasoning, salt, and pepper. Stir together until smooth and creamy.
3. Combine the Main Ingredients:
Add the cooked chicken and steamed broccoli to the creamy mixture. Stir gently to coat everything evenly. Then fold in half of the shredded cheddar cheese and half of the Parmesan cheese.
4. Assemble and Bake:
Grease a 9×13-inch baking dish and spread the mixture evenly inside. Sprinkle the remaining cheddar and Parmesan cheese over the top.
Bake uncovered for 25-30 minutes, until the casserole is bubbly and the cheese on top is beautifully golden brown and slightly crispy.
5. Serve and Garnish:
Let the casserole cool for a few minutes after baking. Sprinkle with fresh parsley or chives if you like, then serve warm and enjoy your creamy, cheesy low-carb chicken casserole!
Can I Use Frozen Broccoli Instead of Fresh?
Yes, frozen broccoli works well! Just thaw it first and pat dry to remove excess moisture before adding it to the casserole to avoid sogginess.
Can I Make This Casserole Ahead of Time?
Absolutely! Prepare the casserole, cover it tightly, and refrigerate for up to 24 hours. When ready, bake it a few extra minutes until heated through and bubbly.
How Should I Store Leftovers?
Keep leftovers in an airtight container in the fridge for 3-4 days. Reheat gently in the oven or microwave to maintain creaminess and flavor.
Can I Substitute the Chicken with Another Protein?
Yes! Cooked turkey, ham, or even cooked shrimp are great alternatives to chicken and can add different flavors to the casserole.