Name: Low Carb Sausage, Mushroom and Chicken Casserole Recipe
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 3 to 4 cups diced cooked chicken; 1 lb sausage; 1 stalk celery, chopped fine; 1 tablespoon onion, chopped; 1/2 lb mushrooms, sliced; 16 ounces frozen cauliflower, cooked well and drained; 8 ounces cream cheese, softened; 8 ounces cheddar cheese, shredded; Salt, to taste; 1/2 teaspoon pepper; Paprika (optional, for dusting)

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If you’re searching for a comforting, hearty dish that won’t weigh you down, this Low Carb Sausage, Mushroom and Chicken Casserole Recipe is an absolute must-try. It perfectly balances rich, savory flavors with a satisfying texture thanks to succulent sausage, tender chicken, earthy mushrooms, and creamy cheeses—all while keeping carbs low. Whether you’re feeding a crowd or meal prepping for the week, this casserole delivers warmth and indulgence without the carb overload.

Ingredients You’ll Need

The image shows a black baking pan with a casserole-like dish inside. The dish has one visible layer made of small pieces of light brown sausage mixed with creamy melted cheese that is yellowish with browned spots on top. There are also bits of mushrooms scattered throughout, which are a mix of light and dark gray colors. The cheese layer looks bubbly and soft with some areas browned, giving a slightly crispy texture. The background and surface around the pan have a white marbled texture. Photo taken with an iphone --ar 4:5 --v 7

Getting these simple yet essential ingredients together is the first step to making a casserole that bursts with flavor, good texture, and inviting colors. Each item plays a key role in creating a rich, creamy consistency with just the right heartiness.

Diced cooked chicken: Adds protein and tender juiciness for a hearty base.
Pork sausage (1 lb): Brings bold, savory flavor and a satisfying richness.
Celery stalk, finely chopped: Provides a gentle crunch and subtle freshness.
Onion, chopped: Adds sweetness and depth when sautéed.
Mushrooms (1/2 lb), sliced: Earthy notes and meaty texture complement the sausage beautifully.
Cream cheese (8 ounces), softened: Gives luscious creaminess and binds the casserole together.
Frozen cauliflower (16 ounces), cooked and drained: Low carb vegetable that mimics classic starches for texture and bulk.
Cheddar cheese (8 ounces), shredded: Adds sharpness, richness, and a golden cheesy crust.
Salt and pepper: Essential seasonings to enhance and brighten every bite.
Paprika (optional): For a subtle smoky kick and pretty color on top.

How to Make Low Carb Sausage, Mushroom and Chicken Casserole Recipe

Step 1: Brown Sausage and Vegetables

Start by browning the sausage in a large skillet over medium heat. As it starts to release its flavorful fat, toss in the finely chopped celery, onion, and sliced mushrooms. Cook everything together until the vegetables soften and the sausage is nicely caramelized. This step builds the deep, savory foundation that carries the entire casserole.

Step 2: Incorporate Cream Cheese

Once the sausage and veggies are cooked, stir in the softened cream cheese right in the pan. It will melt into the mixture, coating everything with a creamy, decadent texture that makes every bite irresistibly smooth and rich. Take your time here to blend until perfectly combined.

Step 3: Prepare the Cauliflower

While the sausage mixture cools slightly, chop the cooked and drained cauliflower roughly. This helps distribute it evenly throughout the casserole, adding a low carb alternative to traditional starchy carbs but still maintaining an excellent mouthfeel and lightness.

Step 4: Mix All Ingredients and Transfer

In a large bowl, combine the sausage mixture, cauliflower, diced cooked chicken, and shredded cheddar cheese. Mix everything gently but thoroughly, then spread the mixture evenly in a greased 9″x13″ baking dish. This layering brings all elements together in perfect harmony.

Step 5: Add Paprika and Bake

Dust the top lightly with paprika if you like a dash of smoky color and flavor. Cover the dish with foil and bake at 350ºF for about 30 minutes, allowing the casserole to heat through and meld the flavors. Then uncover and bake for an additional 10 to 15 minutes, until the top is bubbly and nicely browned, signaling it’s ready to serve.

How to Serve Low Carb Sausage, Mushroom and Chicken Casserole Recipe

A close-up of a white plate holding a mixed dish with about three main layers, where the bottom and top layers are uneven chunks of creamy white potatoes with light brown crispy edges, and the middle layer is a blend of small brown bits of meat and some green herbs, combined together with a thick, light beige creamy sauce. A shiny silver fork lies on the left side of the plate. The plate is set on a white marbled surface with a soft blue and white cloth partially visible. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

A sprinkle of fresh chopped parsley or chives adds a burst of green freshness that balances the casserole’s richness perfectly. For a little extra zest, a dollop of sour cream or a few pickled jalapeños on the side can provide delightful contrast and texture.

Side Dishes

This casserole shines as a standalone meal, but if you want to round it out, try serving it with a crisp green salad tossed in a light vinaigrette or roasted seasonal vegetables like asparagus or Brussels sprouts. These sides keep the meal fresh and add vibrant color to your plate.

Creative Ways to Present

For a fun twist, serve the casserole scooped into individual ramekins and baked until bubbly for a personal touch. You can also top with extra shredded cheddar and broil briefly for an irresistible golden crust. Another idea is layering it over cauliflower rice for an elegant, low carb feast.

Make Ahead and Storage

Storing Leftovers

Place any leftovers in an airtight container and refrigerate for up to 4 days. The casserole actually tastes even better the next day as the flavors have more time to meld, making it ideal for busy weeknight meals.

Freezing

This Low Carb Sausage, Mushroom and Chicken Casserole Recipe freezes beautifully. Portion it into airtight freezer-safe containers or wrap tightly with foil and plastic wrap, then freeze for up to 3 months. Thaw overnight in the fridge before reheating for best results.

Reheating

Reheat refrigerated or thawed casserole in the oven at 350ºF until warmed through and bubbly, about 20 minutes. You can also microwave individual portions, though the oven method keeps the casserole’s texture intact and delicious.

FAQs

Can I use fresh cauliflower instead of frozen?

Absolutely! Fresh cauliflower works great—just steam or boil it until tender, drain well, and chop coarsely before mixing into the casserole to maintain the right low carb texture.

Is it possible to make this dish dairy-free?

Yes, but you’ll need to substitute the cream cheese and cheddar cheese with dairy-free alternatives like vegan cream cheese and shredded plant-based cheese to keep that creamy, cheesy goodness.

Can I prepare this recipe ahead of time and bake later?

Definitely! Prepare the casserole up to the baking step, cover tightly, and refrigerate overnight. When ready, bake as directed; just add a few extra minutes if baking from cold.

What sausage type is best to use?

Use a flavorful pork sausage such as Italian or breakfast sausage, depending on your preference. Spicier sausages add a nice kick, while mild versions keep all the flavor without heat.

How low carb is this casserole?

Thanks to cauliflower replacing traditional starches and the protein-rich ingredients, this casserole stays low in carbs, making it perfect for ketogenic or low carb diets without sacrificing flavor or satisfaction.

Final Thoughts

This Low Carb Sausage, Mushroom and Chicken Casserole Recipe is a fantastic way to enjoy a rich, comforting meal without the carb guilt. The blend of savory sausage, tender chicken, earthy mushrooms, and creamy cheeses is undeniably delicious and perfect for family dinners, meal prep, or cozy nights in. I can’t recommend it enough — once you try it, it’ll quickly become a favorite that you’ll want to make again and again.