Can I make this recipe ahead of time?

Yes. I often prepare the filling in the morning and cover it. I keep it in the fridge and bake it just before dinner. It keeps the texture fresh and the timing flexible.

Is this casserole dairy-free friendly?

Not as written. The heavy cream and cheese are central to the texture and flavor. You can try canned coconut cream and a dairy-free cheese, but the flavor will change. For a closer match, use a high-fat coconut cream and a firm dairy-free cheese that melts.

Can I use raw chicken instead of cooked?

Yes, but cook time will change. If you use raw diced chicken, brown it in the skillet first until no pink remains. Then proceed with mushrooms and cream and increase oven time by 10 to 15 minutes, or until the chicken reaches 165°F.

How do I make it more filling for hungry teenagers?

Add roasted cauliflower or extra mushrooms. You can also top with a few chopped, roasted walnuts for a nutty crunch that keeps it keto and adds calories.

Can I freeze it before baking?

Yes. Assemble it in a freezer-safe dish. Wrap tightly with foil and freeze for up to 3 months. When ready to bake, thaw overnight then bake as written, adding 10 to 15 minutes if still slightly cold.

Easy Keto Garlic Mushroom Chicken Casserole 2026

Description

A comforting, low-carb dish featuring tender chicken and mushrooms in a creamy garlic sauce, perfect for busy weeknights.

Ingredients

2 cups cooked chicken, shredded
2 cups mushrooms, sliced
1 cup heavy cream
4 cloves garlic, minced
1 cup shredded cheese (Cheddar or mozzarella)
2 tablespoons olive oil
1 teaspoon dried thyme
Salt and pepper to taste
1/4 cup fresh parsley, chopped (for garnish)

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Instructions

Preheat the oven to 350°F (175°C).
Heat olive oil in a large skillet over medium heat. Add mushrooms and garlic, sautéing until softened.
Combine shredded chicken, sautéed mushrooms, heavy cream, cheese, thyme, salt, and pepper in a mixing bowl. Stir until well mixed.
Pour the mixture into a casserole dish and smooth the top.
Bake for 25-30 minutes until bubbly and golden on top. Garnish with fresh parsley before serving.

Notes

Add a splash of cream when reheating to keep the sauce loose. For a crisp top, broil for a few minutes after baking.

Prep Time: 20 minutes
Cook Time: 30 minutes
Category: Main Course
Method: Baking
Cuisine: American