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The Best Creamy & Healthy Butternut Squash Mac and Cheese

A beautiful and cozy bowl of homemade, creamy Butternut Squash Mac and Cheese being served for dinner.

A creamy and healthier version of baked macaroni and cheese that features a velvety sauce made from pureed butternut squash. The sauce is created by simmering butternut squash with broth, milk, and garlic until tender, then blending it with Greek yogurt and spices until smooth. This is combined with cooked pasta, optional kale, and shredded cheese like Gruyère or sharp cheddar. The casserole is topped with breadcrumbs and baked until hot and bubbly.

Ingredients

  • 4 cups peeled and cubed butternut squash
  • 1 1/4 cups vegetable broth or chicken broth
  • 1 1/4 cups milk
  • 3 cloves garlic, minced
  • 1 pound uncooked small or medium pasta shells
  • 1–2 cups roughly chopped kale, stems discarded (optional)
  • 1/3 cup plain Greek yogurt
  • 1 teaspoon salt
  • 1/2 teaspoon freshly ground black pepper
  • Small pinch of ground nutmeg
  • 2 cups shredded cheese (Gruyère or sharp white cheddar recommended)
  • 1/3 cup breadcrumbs (optional topping)
  • Fresh thyme leaves for garnish (optional)

Instructions

  1. In a medium saucepan, combine the butternut squash, broth, milk, and garlic. Bring to a boil, then reduce the heat and simmer for 20 minutes, until the squash is very tender.
  2. While the squash simmers, preheat the oven to 375°F. Cook the pasta in a large pot of boiling, salted water until al dente. If using kale, add it during the last 1-2 minutes of cooking. Drain the pasta and kale.
  3. Pour the warm butternut squash mixture (including all the liquid) into a blender. Add the Greek yogurt, salt, pepper, and nutmeg. Blend until completely smooth.
  4. Pour the blended squash sauce into a very large bowl. Stir in the shredded cheese until combined (it’s okay if it doesn’t fully melt).
  5. Add the cooked pasta and kale to the sauce and stir to combine.
  6. Pour the entire mixture into an ungreased 9×13-inch baking pan or a similar 3 to 4-quart baking dish. Top with breadcrumbs, if desired.
  7. Cover the dish with aluminum foil and bake for 20 minutes.
  8. Remove the foil and bake for another 5 minutes, or until the casserole is bubbly on the sides.
  9. Remove from the oven, let it rest for a few minutes, and serve with an optional garnish of fresh thyme.

Notes

  • This recipe uses a blended butternut squash and Greek yogurt sauce as a healthier, vegetable-packed alternative to a traditional butter and flour-based cheese sauce.
  • The sauce will seem very liquidy at first, but the pasta will continue to absorb it as it bakes and rests.
  • The casserole can be stored in an airtight container in the refrigerator for up to 5 days.