Creamy Low Carb Chicken Casserole

The first time I made this casserole, it was a Tuesday night and I was craving something that felt like a hug but would not derail my eating habits. My kitchen smelled incredible as the sauce came together, rich and velvety, and I knew this would become a regular rotation.

Last winter my sister came over for dinner, skeptical about another low carb meal. She took one bite and actually went quiet for a moment, then asked if I could make it for her upcoming dinner party. That is when I knew this recipe was special.

Ingredients

• Boneless skinless chicken breasts: Cutting them into bite sized pieces helps them cook evenly and stay tender throughout baking
• Broccoli florets: Fresh broccoli holds up beautifully in the creamy sauce without turning mushy
• Sliced mushrooms: They release umami rich juices that deepen the overall flavor profile
• Diced onion and minced garlic: This aromatic foundation makes the kitchen smell amazing while building layers of savory flavor
• Heavy cream: The base that creates that restaurant quality velvety texture we all crave
• Shredded mozzarella and grated parmesan: These two cheeses together create the perfect balance of melt and sharp savory notes
• Cream cheese: My secret ingredient for making the sauce incredibly thick and clingy
• Chicken broth: Adds depth and prevents the sauce from becoming too heavy
• Dried thyme: Earthy and subtle, it complements the creamy elements without overpowering
• Salt and black pepper: Simple seasonings that let the quality ingredients shine

Instructions

Get your oven ready:

Preheat to 200°C (400°F) so it is hot and waiting when your filling is prepared

Build your aromatics:

Heat olive oil in a large skillet over medium heat, then sauté onions and garlic for 2–3 minutes until fragrant and translucent

Brown the chicken:

Add chicken pieces to the skillet and cook for 5–6 minutes until golden on the outside but not fully cooked through

Add the vegetables:

Toss in mushrooms and broccoli, sautéing another 3–4 minutes until vegetables start to soften, then remove from heat

Make the magic sauce:

In a saucepan, combine heavy cream, chicken broth, cream cheese, dried thyme, salt, and pepper, heating gently while stirring until completely smooth

Melt in the cheeses:

Stir in mozzarella and parmesan cheese until melted and sauce thickens nicely, about 2–3 minutes

Combine everything:

Mix the chicken and vegetable blend with the creamy sauce in a large bowl until every piece is coated

Assemble the casserole:

Transfer the mixture to a greased casserole dish and top with the optional shredded mozzarella

Bake until bubbly:

Bake for 20–25 minutes until the cheese is golden and the sauce is bubbling around the edges

Add the finishing touch:

Sprinkle fresh parsley over the top right before serving for a pop of color and freshness

Save

This recipe has become my go to when friends need comforting but are watching their carbs. There is something so satisfying about serving a dish that feels indulgent yet aligns with healthier eating goals.

Making It Ahead

You can assemble the entire casserole up to a day in advance, cover tightly, and refrigerate until ready to bake. Just add 5–10 minutes to the baking time if baking cold from the refrigerator.

Easy Variations

Sometimes I swap broccoli for cauliflower or spinach depending on what is in my crisper drawer. The creamy sauce works beautifully with almost any vegetable combination you prefer.

Serving Suggestions

A crisp green salad with a tangy vinaigrette cuts through the richness perfectly. A dry white wine like sauvignon blanc complements the creamy sauce without overwhelming the delicate flavors.

• Crumbled cooked bacon on top adds smoky crunch
• A dash of smoked paprika in the sauce gives it a subtle barbecue vibe
• Leftovers reheat beautifully in the microwave for a quick lunch

Save

This casserole proves that low carb eating does not mean sacrificing comfort. Enjoy every creamy, satisfying bite.

Recipe FAQs

→ Can I make this casserole ahead of time?

Yes, assemble everything up to 24 hours in advance and refrigerate. Add 5-10 minutes to the baking time if cooking from cold.

→ What vegetables work best in this dish?

Broccoli, mushrooms, and onions are classic choices, but cauliflower, spinach, or bell peppers also work beautifully.

→ How do I store leftovers?

Store in an airtight container in the refrigerator for 3-4 days. Reheat gently in the microwave or oven.

→ Can I use rotisserie chicken?

Absolutely. Use about 3 cups of shredded rotisserie chicken and skip the initial browning step—just combine with vegetables and sauce.

→ Is this freezer-friendly?

Yes, freeze before baking for up to 3 months. Thaw overnight in the refrigerator, then bake as directed.