Cheesy Butternut Squash Casserole (Recipe for Printing)

Enjoy this fall-inspired butternut squash casserole loaded with tangy Gruyere, Parmesan, kale, and sourdough. Perfect for holiday gatherings or weeknight comfort. Save & click.

# What You Need:

→ Produce

01 - 1 medium yellow onion, finely chopped
02 - 5 garlic cloves, minced
03 - 1 bunch lacinato kale, stems and ribs removed, chopped
04 - 2 pounds butternut squash, peeled and cubed
05 - 1 tablespoon fresh thyme leaves

→ Dairy

06 - 1 cup heavy cream
07 - 1/3 cup plus 2 tablespoons grated Parmesan cheese, divided
08 - 1/2 cup shredded Gruyere or Gouda cheese

→ Pantry

09 - 4 tablespoons extra-virgin olive oil, divided
10 - 1/4 to 1/2 teaspoon crushed red pepper flakes
11 - 1 tablespoon Dijon mustard
12 - 3/4 teaspoon kosher salt
13 - 1/2 teaspoon ground black pepper

→ Bread

14 - 2 cups torn or roughly chopped sourdough bread

→ Nuts

15 - 1/3 cup finely chopped walnuts

# How to Make It:

01 - Preheat oven to 425°F. Heat 2 tablespoons of olive oil in a large sauté pan over medium heat. Once oil is shimmering, add the chopped onion and cook for 7 to 8 minutes until softened.
02 - Stir in minced garlic and crushed red pepper flakes. Cook for 2 minutes until fragrant. Add chopped kale and cook an additional 2 to 3 minutes until wilted.
03 - Add heavy cream, 1/3 cup grated Parmesan, Dijon mustard, fresh thyme leaves, kosher salt, and ground black pepper. Simmer the mixture for 3 to 5 minutes, stirring often, until thickened.
04 - In a large mixing bowl, toss cubed butternut squash with the remaining 2 tablespoons olive oil. Combine seasoned squash with the creamy kale mixture. Fold in shredded Gruyere cheese.
05 - Pour the mixture into a greased baking dish. Scatter torn sourdough bread pieces and chopped walnuts evenly over top. Sprinkle remaining 2 tablespoons Parmesan cheese across casserole.
06 - Bake uncovered for 30 to 45 minutes until the squash is tender and the topping is golden brown. Allow to cool slightly before serving.

# Extra Tips:

01 - For extra depth of flavor, toast the walnuts prior to adding them as topping.

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