Creamy Low Carb Chicken Casserole

The first time I made this casserole, it was purely out of desperation to use up leftover chicken and a random assortment of vegetables from my crisper drawer. That night, my husband took one bite and actually asked if I'd been secretly taking cooking classes, which still makes me laugh.

I remember serving this at a small dinner party last winter when my friend mentioned she was watching her carbs. Watching everyone go back for seconds while she raved about not feeling deprived was honestly the best feedback I could have asked for.

Ingredients

• Chicken breasts: Cutting them into uniform bite-sized pieces ensures everything cooks evenly and no one gets stuck with a dry, overcooked chunk
• Broccoli florets: Fresh broccoli holds up better during baking than frozen, plus it adds those lovely bright green pops of color
• Mushrooms: They release their juices into the sauce while baking, creating an extra depth of flavor you dont get from just cream alone
• Heavy cream: This is what transforms ordinary ingredients into something luxurious and restaurant-worthy
• Mozzarella and parmesan: The combination gives you both that perfect melted cheese pull and that salty, nutty depth
• Chicken broth: A splash prevents the sauce from becoming too heavy and adds a savory backbone
• Cream cheese: The secret to making the sauce silky smooth rather than grainy or separated
• Dried thyme: Earthy and subtle, it bridges the gap between the creamy elements and the vegetables

Instructions

Preheat and prep:

Get your oven to 200°C and have everything ready before you start cooking, since this recipe moves fast once you begin

Sauté aromatics:

Heat olive oil in your large skillet and cook the onions and garlic until your kitchen starts to smell amazing, about 2 to 3 minutes

Brown the chicken:

Add the chicken pieces and let them develop a golden color on the outside, but dont worry about cooking them through since theyll finish in the oven

Add vegetables:

Toss in the mushrooms and broccoli and give everything a few more minutes to soften slightly and get acquainted

Make the sauce:

In a separate saucepan, gently heat the cream, broth, and cream cheese with thyme, salt, and pepper until you have a smooth, velvety mixture

Melt in cheeses:

Stir in the mozzarella and parmesan until they disappear into the sauce, letting it thicken into something spoonable and gorgeous

Combine everything:

Pour the sauce over your chicken and vegetables in a large bowl and fold it together until every piece is coated

Assemble and bake:

Transfer to your casserole dish, sprinkle the extra mozzarella on top if youre using it, and bake until bubbly and golden

Finish and serve:

Let it rest for just a few minutes before scattering fresh parsley on top and serving it to people who will absolutely ask for seconds

Save to Pinterest

This casserole has become my go-to when friends have babies or need a meal train contribution. Something about bubbling cheese and tender vegetables just says comfort in a way that feels like a hug.

Make It Your Own

Once you get the basic sauce down, you can really play with the vegetables based on what you have or what's in season. I've used cauliflower, spinach, and even bell peppers with great success.

The Shortcut Secret

Some nights I skip the raw chicken entirely and use a rotisserie chicken from the store. You just add it with the vegetables instead of browning it first, and it still comes out incredible.

Serving Suggestions

This dish is rich enough to stand on its own, but I love serving it alongside a crisp green salad with a bright vinaigrette. The acid cuts through the cream perfectly.

• A dry white wine like sauvignon blanc pairs beautifully with the rich sauce
• Keep extra parmesan at the table for people who want to sprinkle more on top
• If you're not strictly low carb, some crusty bread to soak up the sauce is pretty dreamy

Save to Pinterest

There's something deeply satisfying about watching people genuinely enjoy food that's both comforting and aligned with their health goals. This recipe hits that sweet spot every single time.

Frequently asked questions about this recipe

→ Can I make this ahead of time?

Yes, you can assemble the entire dish up to 24 hours in advance and refrigerate. Bake when ready, adding 5-10 minutes to the cooking time if baking cold from the refrigerator.

→ What vegetables work best in this dish?

Broccoli and mushrooms are classic choices, but cauliflower, spinach, bell peppers, or zucchini also work beautifully. Adjust cooking times slightly for softer vegetables like spinach.

→ Can I freeze leftovers?

Absolutely. Portion cooled leftovers into airtight containers and freeze for up to 3 months. Thaw overnight in the refrigerator and reheat at 180°C (350°F) until warmed through.

→ How can I reduce the calories?

Substitute half-and-half for heavy cream, reduce the amount of cheese by one-third, or increase the vegetable ratio while keeping portions the same. The dish will still be satisfying and flavorful.

→ What should I serve with this?

A crisp green salad with vinaigrette balances the richness perfectly. Roasted cauliflower or steamed green beans also complement nicely. For a low-carb option, try cauliflower rice or simply enjoy on its own.

→ Can I use rotisserie chicken?

Certainly. Use about 3 cups of shredded rotisserie chicken and skip the initial browning step. Simply combine with the vegetables and sauce, then bake as directed. This cuts prep time significantly.