Creamy Onion Chicken Bake (Printable Version)

Chicken baked in creamy onion sauce with mushrooms and bell peppers, finished with optional cheese topping.

# What You'll Need:

→ Poultry

01 - 4 boneless, skinless chicken breasts

→ Produce

02 - 4 large onions, thinly sliced
03 - 1 red bell pepper, sliced
04 - 1 yellow bell pepper, sliced
05 - 7 ounces (about 2 3/4 cups) mushrooms, sliced
06 - 1 garlic clove, minced

→ Dairy

07 - 2 tablespoons butter
08 - 3/4 cup heavy cream
09 - 1/2 cup grated cheese (optional, for topping)

→ Pantry

10 - 1 tablespoon all-purpose flour
11 - 1 cup chicken broth
12 - 1 teaspoon dried thyme
13 - Salt, to taste
14 - Black pepper, to taste

# Directions:

01 - Preheat oven to 400°F (200°C). Season chicken breasts with salt and pepper and arrange in a baking dish.
02 - Melt butter in a large skillet over medium heat. Add sliced onions and sauté until soft and golden, about 8–10 minutes. Add minced garlic and cook for 1 minute.
03 - Sprinkle flour over the onions and stir for 1 minute. Gradually whisk in chicken broth and heavy cream, scraping any browned bits from the bottom. Simmer until sauce slightly thickens, about 3–5 minutes. Season with thyme, salt, and black pepper.
04 - Add sliced red and yellow bell peppers and mushrooms to the onion sauce. Mix well to evenly coat the vegetables.
05 - Pour the creamy vegetable sauce over the chicken breasts in the baking dish. Sprinkle grated cheese over the top if desired. Bake uncovered for 30 minutes, until chicken is cooked through and sauce is bubbling.
06 - Serve hot with rice, pasta, or Spätzle if desired.

# Additional Tips::

01 -
  • Uses simple fridge staples you may already have
  • Cooks in one baking dish which means less cleanup on busy nights
  • Sauce turns out rich and creamy without heavy effort
  • Family friendly and great for leftovers
02 -
  • Packed with protein and vegetables for a balanced meal
  • Perfect for make ahead and reheats well
  • You can adapt the level of creaminess by tweaking the amount of cream
03 -
  • Use an oven safe skillet for both the sauce and baking to make this a true one pan meal
  • Let the onions caramelize gently and do not rush this step for deep flavor
  • Taste the sauce before pouring it over chicken to ensure perfect seasoning

Return