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Chicken, Leek, and Butternut Squash Bake Recipe

4.9 from 71 reviews

This comforting Chicken Leek and Butternut Squash Bake combines tender diced chicken with sweet butternut squash and flavorful leeks in a creamy, cheesy sauce. Baked to perfection with a golden breadcrumb topping, this dish is perfect for a hearty weeknight dinner or cozy family meal.

Ingredients

Scale

Protein and Vegetables

  • 1 lb chicken breast, diced
  • 2 cups butternut squash, peeled and cubed
  • 2 large leeks, cleaned and sliced
  • 2 cloves garlic, minced

Seasonings and Liquids

  • 1 tbsp olive oil
  • 1 tsp thyme (fresh or dried)
  • Salt and pepper, to taste
  • 1/2 cup chicken broth
  • 1/2 cup heavy cream or crème fraîche
  • 1/4 tsp ground nutmeg

Cheese and Topping

  • 1/2 cup grated Parmesan cheese
  • 1/2 cup breadcrumbs (optional)
  • Cooking spray or butter for greasing

Instructions

  1. Preheat and Prepare: Preheat your oven to 375°F (190°C) and lightly grease a baking dish with cooking spray or butter to prevent sticking.
  2. Cook Chicken: Heat olive oil in a skillet over medium heat. Add diced chicken seasoned with salt and pepper, and cook until no longer pink in the center. Remove the chicken from the skillet and set aside.
  3. Sauté Leeks and Garlic: In the same skillet, add the sliced leeks and sauté for about 5 minutes until they are softened. Add the minced garlic and thyme, cooking for an additional minute to release their aromas.
  4. Cook Butternut Squash: Add the cubed butternut squash to the skillet and cook for around 5 minutes until it starts to turn slightly golden.
  5. Combine Ingredients and Simmer: Return the cooked chicken to the skillet. Stir in the chicken broth, heavy cream or crème fraîche, ground nutmeg, and half of the grated Parmesan cheese. Simmer the mixture for 2 to 3 minutes until slightly thickened and well combined.
  6. Assemble in Baking Dish: Transfer the entire skillet mixture into the prepared baking dish. Sprinkle the remaining Parmesan cheese evenly on top, followed by the breadcrumbs if using, to create a golden crust.
  7. Bake: Place the baking dish in the preheated oven and bake for 25 to 30 minutes until the top is golden brown and bubbling.
  8. Rest and Serve: Once baked, let the dish rest for 5 minutes before serving to allow the flavors to meld and make it easier to portion.

Notes

  • You can substitute chicken thighs for chicken breast if you prefer darker meat, which will add more moisture.
  • For a lower calorie version, use half-and-half or milk instead of heavy cream, but the sauce will be less rich.
  • Breadcrumb topping is optional but adds a nice crunchy texture contrast.
  • Make sure to clean leeks thoroughly as they can hold dirt between layers.
  • This dish reheats well and is even better the next day as flavors deepen.

Keywords: chicken bake, butternut squash recipe, leek chicken casserole, creamy chicken bake, easy dinner, baked chicken and vegetables