Creamy Low Carb Chicken Casserole

The first time I made this casserole, my apartment smelled like an Italian restaurant had taken over my kitchen. My roommate actually came home early from work because the aromas of garlic, thyme, and melting cheese were too intriguing to ignore. We ended up eating it straight from the baking dish, standing over the counter, both of us agreeing this was the kind of comfort food that makes you forget it's actually good for you.

Last winter I made this for my friend who was doing keto and feeling completely deprived of anything satisfying. She took one bite, closed her eyes, and literally whispered 'thank you' to her plate. Now she requests it every time she visits, and I've started doubling the recipe just to have leftovers for lunch the next day.

Ingredients

• Boneless skinless chicken breasts: Cutting these into bite sized pieces before cooking ensures every bite is tender and perfectly seasoned throughout
• Broccoli florets: Fresh broccoli holds up better during baking than frozen and adds beautiful pops of green color
• Sliced mushrooms: These release their umami rich juices into the sauce as they cook, deepening the overall flavor
• Diced onion: Finely diced onion almost melts into the sauce providing sweetness without any crunchy texture
• Minced garlic: Fresh garlic is essential here, powder just does not give the same aromatic depth
• Heavy cream: This creates the velvety base that makes the sauce feel luxurious and indulgent
• Shredded mozzarella: Mozzarella melts into gorgeous strands and provides that classic cheese pull
• Grated parmesan: The salty nuttiness of parmesan balances the creaminess perfectly
• Chicken broth: A good quality broth adds depth without thinning the sauce too much
• Cream cheese: This secret ingredient makes the sauce cling to everything and adds tangy richness
• Olive oil: Use a neutral olive oil for sautéing so it does not compete with the other flavors
• Dried thyme: Thyme pairs beautifully with both chicken and creamy sauces
• Salt and pepper: Adjust these to your taste but do not skip them, they make all the other ingredients sing
• Extra mozzarella for topping: This optional layer creates that irresistible golden bubbly crust
• Fresh parsley: A sprinkle of fresh herbs at the end cuts through the richness beautifully

Instructions

Get your oven ready:

Preheat to 200°C with the rack in the center position so the casserole cooks evenly

Sauté the aromatics:

Heat olive oil in a large skillet over medium heat and cook onions and garlic for 2 to 3 minutes until fragrant and softened

Brown the chicken:

Add chicken pieces to the skillet and cook for 5 to 6 minutes until golden on the outside but still slightly pink inside

Add the vegetables:

Toss in mushrooms and broccoli and sauté for another 3 to 4 minutes until broccoli turns bright green

Make the sauce:

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

Melt in the cheese:

Stir in mozzarella and parmesan cheese until completely melted and sauce has thickened slightly, about 2 to 3 minutes

Combine everything:

Pour the creamy sauce over the chicken and vegetable mixture in a large bowl and stir until everything is well coated

Assemble the casserole:

Transfer the mixture to a greased casserole dish and sprinkle the extra mozzarella on top if using

Bake to perfection:

Bake for 20 to 25 minutes until the sauce is bubbling around the edges and the cheese on top is golden brown

Finish and serve:

Let the casserole rest for about 5 minutes before sprinkling with fresh parsley and serving

Pin It

This recipe has saved me on countless weeknights when I wanted something that felt special but did not require three hours of prep. The way the sauce reduces in the oven, coating every piece of chicken and vegetable in a blanket of cheesy goodness, is absolutely magical.

Making It Your Own

I have discovered that cauliflower works beautifully instead of broccoli if you prefer a milder flavor. Sometimes I add spinach during the last few minutes of sautéing just to wilt it down, which adds nutrients without changing the taste profile much.

Time Saving Tricks

On busy days I use a rotisserie chicken from the grocery store and skip the browning step entirely. I just warm the shredded chicken with the vegetables before adding the sauce, which cuts the prep time in half without sacrificing flavor.

Serving Suggestions

This casserole is satisfying enough to stand alone but I love serving it with a crisp green salad dressed simply with lemon and olive oil. The freshness balances the rich creaminess perfectly.

• A chilled dry white wine like Sauvignon Blanc cuts through the richness beautifully
• Steamed green beans on the side add a nice texture contrast
• Leftovers reheat surprisingly well for lunch the next day

Pin It

There is something so comforting about pulling a golden bubbling casserole out of the oven, especially one that happens to be low carb. This recipe proves you do not have to sacrifice satisfaction or flavor to eat the way you want.

Recipe FAQs

→ Can I make this ahead of time?

Absolutely. Assemble the entire dish up to 24 hours in advance, refrigerate covered, then bake when ready. Add 5-10 minutes to the baking time if baking cold from the refrigerator.

→ What vegetables work best as substitutions?

Cauliflower florets, spinach, or zucchini slices all work beautifully. Just keep the total vegetable quantity similar to ensure proper consistency and cooking time.

→ Can I use cooked chicken?

Yes, rotisserie chicken or leftover cooked chicken works perfectly. Skip the initial browning step and combine the cooked chicken with the sautéed vegetables before adding the sauce.

→ How should I store leftovers?

Store in an airtight container in the refrigerator for 3-4 days. Reheat individual portions in the microwave or cover with foil and warm in a 180°C (350°F) oven until heated through.

→ Can I freeze this casserole?

Yes, freeze before baking for best results. Wrap tightly and freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed.