Chicken Spinach Mushroom Casserole (Print version)

Creamy, cheesy low-carb dish with chicken, spinach, and mushrooms baked to golden perfection.

# What You Need:

→ Proteins

01 - 2 cups cooked chicken breast, chopped or shredded

→ Vegetables

02 - 4 cups fresh spinach
03 - 2 cups mushrooms, sliced
04 - 1 small onion, finely chopped
05 - 3 cloves garlic, minced

→ Dairy

06 - 1 cup mozzarella cheese, shredded
07 - 1/4 cup parmesan cheese, grated
08 - 1/2 cup heavy cream

→ Oils & Seasonings

09 - 2 tablespoons olive oil
10 - 1 teaspoon Italian seasoning
11 - Salt and pepper to taste

# How to Make:

01 - Preheat oven to 375°F. Lightly grease a 9×13 inch casserole dish.
02 - In a large skillet, heat olive oil over medium heat. Add onions and mushrooms; sauté for 5–7 minutes until soft and lightly browned.
03 - Add minced garlic and cook for 1 minute until fragrant.
04 - Stir in spinach and cook until wilted. Season the mixture with salt, pepper, and Italian seasoning.
05 - Spread cooked chicken evenly across the bottom of the prepared casserole dish.
06 - Layer the sautéed mushroom, spinach, and onion mixture over the chicken.
07 - Drizzle heavy cream evenly over the top.
08 - Sprinkle mozzarella and parmesan cheese over the entire dish.
09 - Bake uncovered for 20–25 minutes, or until the cheese is melted and golden brown.
10 - Remove from oven and let rest for 5 minutes before serving.

# Expert tips:

01 -
  • It comes together in under 40 minutes, which means you can have dinner ready before you've finished your drink at the counter.
  • The creamy cheese sauce clings to everything without requiring any fussy cream reduction tricks.
  • Leftovers taste even better the next day, making it the kind of meal that rewards meal prep without feeling like work.
02 -
  • Mushrooms and spinach release water when you cook them, so sauté them thoroughly until they look almost dry—this is the difference between a creamy casserole and a soupy one.
  • Don't skip the 5-minute rest at the end, even though you're hungry and it's right there; the cream and cheese need that time to set up slightly or everything slides around.
03 -
  • If you use rotisserie chicken, remove the skin and chop it up right before assembling so it stays moist and tender instead of drying out in the oven.
  • The key to golden, gorgeous cheese is leaving the casserole uncovered while it bakes—covered means steamy and pale, uncovered means Instagram-worthy and delicious.
Go back