Chicken Fillets in Creamy Homemade White Sauce
Poultry

Chicken Fillets in Creamy Homemade White Sauce

ML
By Marie Lefebvre · Updated September 26, 2026

Tender chicken fillets baked under a velvety herb-infused white sauce — a simple, budget-friendly comfort meal ready in under an hour. Made with everyday pantry staples, it's perfect for busy weeknights.

Prep⏱️ 60 min
Servings👥 6 servings
Difficulty📊 Easy
↓ Jump to Recipe Pin it
Pinterest WhatsApp Facebook

🛒 Ingredients

6 servings

6
  • 400 g chicken breast fillets
  • 1 medium onion, finely chopped
  • 2 garlic cloves, minced
  • 2 tablespoons butter
  • 2 tablespoons all-purpose flour
  • 500 ml whole milk
  • 1 chicken bouillon cube
  • Dried oregano, to taste
  • Salt and black pepper, to taste

Directions

  1. 1

    Preheat the oven to 350 °F (180 °C). Arrange the chicken fillets in a baking dish, season with salt, pepper, and oregano. Set aside.

  2. 2

    In a saucepan over medium heat, melt the butter and sauté the onion for 3 minutes until softened. Add the minced garlic and cook for 1 more minute.

  3. 3

    Crumble the bouillon cube into the pan and stir until fully combined.

  4. 4

    In a bowl, whisk the flour into the cold milk until smooth and lump-free. Pour this mixture into the saucepan, stirring constantly.

  5. 5

    Cook over low heat, stirring continuously, until the sauce thickens — about 5 to 7 minutes. Taste and adjust seasoning.

  6. 6

    Pour the white sauce evenly over the chicken fillets. Bake for 30 to 35 minutes, until the chicken is cooked through and the surface is lightly golden. Serve hot.

💡 Chef's Tip

Top with shredded mozzarella or parmesan 5 minutes before the end of baking for a golden, bubbly crust. Swap 100 ml of milk for heavy cream for an even richer sauce.