If you’re looking for a dinner that feels like a warm hug after a long day—without kicking you out of ketosis—say hello to your new weeknight hero: Keto Garlic Mushroom Chicken Casserole. It’s creamy, savory, and packed with flavor, all while keeping things low-carb. Yes, we love a win-win moment.
Hi love! Luma here from recipeshall.com. You know I’m all about simple, comforting meals that make you excited to sit down and eat. This casserole is one of those dishes that checks every box: quick prep, family-approved, full of flavor, and blessedly keto-friendly. And honestly? Even if you’re not following keto, you’ll still devour this.
⭐ Why You’ll Love This Keto Garlic Mushroom Chicken Casserole
- Low-carb & high-flavor — creamy, garlicky goodness without the carbs
- Weeknight-friendly — ready fast, with minimal prep
- Warm, cozy, and satisfying — perfect for cold evenings or busy days
- Meal-prep magic — reheats like a dream
- Family-friendly — even picky eaters love it
If you enjoy comfy low-carb meals, you might also love my Creamy Garlic Parmesan Chicken—another reader favorite for easy weeknight dinners.
🛒 Ingredients You’ll Need
For the Casserole:
- 1 ½ lbs boneless chicken breasts or thighs, cut into chunks
- 2 cups mushrooms, sliced
- 4 cloves garlic, minced
- 1 small onion, diced
- 2 tablespoons butter
- 1 cup heavy cream
- ½ cup chicken broth
- ¾ cup shredded mozzarella or provolone
- ½ cup grated Parmesan
- 1 teaspoon Italian seasoning
- ½ teaspoon salt
- ½ teaspoon black pepper
- Optional: spinach, parsley, red pepper flakes
👩🍳 How to Make Keto Garlic Mushroom Chicken Casserole
1. Sauté the Chicken
In a large skillet, heat butter over medium heat. Add chicken, sprinkle with salt and pepper, and cook until lightly browned. No need to cook fully—they’ll finish in the oven.
2. Add the Veggies
Add onions, garlic, and mushrooms to the skillet. Cook until veggies soften and the garlic smells amazing. (One of the best kitchen scents, if you ask me.)
3. Make the Cream Sauce
Pour in heavy cream and chicken broth. Add Italian seasoning and Parmesan.
Let it simmer for 3–4 minutes until slightly thickened. The sauce should coat the spoon lightly.
4. Assemble
Transfer everything into a baking dish.
Top with shredded mozzarella or provolone.
5. Bake
Place in a 375°F oven for 18–22 minutes, or until the top is bubble-golden and the chicken is fully cooked.
6. Serve
Sprinkle parsley over the top and serve warm. You’ll probably want seconds—just saying.
🌟 Serving Suggestions (Keto-Friendly!)
- Cauliflower mash
- Roasted broccoli
- Zucchini noodles
- Cauliflower rice
- A simple green salad
If you want more cozy dinner ideas, check out my reader-loved Chicken Bacon Ranch Casserole for another low-carb classic.
💡 Tips to Make It Even Better
- Use thighs for extra tenderness — they’re juicier and hold up beautifully.
- Add spinach — toss in a few handfuls before baking for extra greens.
- Make it spicy — a pinch of red pepper flakes does wonders.
- Thicken the sauce naturally — simmer longer instead of adding thickeners.
And if your sauce looks a little thin going into the oven—don’t worry. The cheese on top does the heavy lifting, and everything bakes into creamy perfection.
❤️ A Little Story From My Kitchen
This casserole came from one of those “what can I make fast before everyone gets hangry?” evenings. I had mushrooms, garlic, chicken, and not much else. So I tossed it all together, added some cream and cheese, and hoped for the best. The first bite? Instant comfort. My family polished the dish within minutes—and now it’s one of my go-to cozy meals.
It’s simple, hearty, and takes me back to those moments when you realize the most comforting dishes often start from the simplest ingredients.
❓ FAQs
Can I use canned mushrooms?
Fresh is best, but yes—just drain them well.
Can I freeze this casserole?
Yes! Freeze after baking, up to 3 months. Reheat covered.
Can I make it dairy-free?
Use coconut cream and dairy-free cheese alternatives.
Can I use rotisserie chicken?
Absolutely. Just skip sautéing the chicken and go straight to the sauce.
This Keto Garlic Mushroom Chicken Casserole brings all the comfort of a creamy, cozy dish without piling on carbs. It’s easy, delicious, and perfect for busy weeknights when you want something satisfying but simple.
