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creamy butternut squash mac and cheese
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Creamy Butternut Squash Mac and Cheese

This creamy butternut squash mac and cheese is so smooth and delicious. It's savory with subtle sweetness, creamy and cheesy, with warm notes from a little bit of nutmeg.
Prep Time20 minutes
Cook Time1 hour 10 minutes
Total Time1 hour 30 minutes
Course: Main Course
Cuisine: American
Servings: 12 people
Calories: 439kcal
Author: Tania

Ingredients

For the butternut squash puree:

  • 1 to 1½ pounds butternut squash a small one
  • 1 small head fresh garlic for roasting
  • Olive oil
  • Salt and pepper
  • ½ cup whole milk

For the mac and cheese:

  • ¾ pound pasta shells
  • 6 tablespoons unsalted butter
  • 1 tablespoon all purpose flour
  • 1 teaspoon garlic powder
  • 1 very small pinch ground nutmeg
  • ½ teaspoon fresh thyme leaves minced
  • ½ teaspoon fresh rosemary minced
  • 1 cup heavy cream
  • ½ cup whole milk plus more as needed
  • 6 ounces freshly shredded yellow cheddar cheese plus more for topping
  • 6 ounces freshly shredded Gouda cheese plus more for topping
  • Salt and pepper to taste

For the breadcrumb topping:

  • ⅓ cup panko breadcrumbs
  • 2 tablespoons unsalted butter
  • ½ teaspoon minced rosemary or 1 small sage leaf

Instructions

Make the butternut squash puree:

  • Preheat oven to 400°F.
  • Slice the top off the garlic head to expose the cloves. Drizzle with olive oil and season with salt and pepper. Wrap tightly in foil to seal. Set aside.
  • Roast: Cut the butternut squash in half lengthwise and scoop out the seeds. Place it on a large baking sheet, flat side up. Drizzle with olive oil and season well with salt and pepper. Place the foil-wrapped garlic head on the pan. Roast at 400°F for 50 minutes, until very tender.
  • Scoop out the squash from the skin (you should have about 1½ cups). Squeeze the roasted garlic from its skin.
  • Blend the squash and garlic cloves with ½ cup milk until smooth and thick.

Make the mac and cheese:

  • Reduce oven to 375°F.
  • Meanwhile, cook the pasta until just shy of al dente (it will finish cooking in the oven). Reserve some pasta water, then drain.
  • In a large 4-quart shallow Dutch oven braiser, melt butter over medium heat. Add flour and stir for 1 minute. Add garlic powder, nutmeg, thyme, and rosemary and cook for another 1-2 minutes to bloom the seasonings.
  • Stir in the butternut squash puree. Then, gradually stir in the heavy cream and milk as needed, and bring to a low simmer.
  • Reduce to low. Stir in the cheeses until melted and smooth, just a few seconds. Turn off the heat. Season with salt and pepper to taste.
  • Stir in the cooked pasta. Add a splash of the reserved pasta water to loosen it up as needed.

Assemble and bake:

  • Make the breadcrumb topping: In a pan, melt 2 tablespoons of butter and toss with the panko and herbs until it smells a little nutty.
  • Transfer the mac and cheese to a 9x13 baking pan if needed (I baked it in the same Dutch oven braiser I used earlier). Top with more shredded cheese, followed by an even layer of the buttered breadcrumbs.
  • Bake UNCOVERED at 375°F for 20-25 minutes, until bubbling and browned on top. Let cool slightly before serving. Serve warm.

Notes

  • Use only one tablespoon of flour, as the thick squash puree acts as a natural thickener.
  • Turn the heat to low before adding freshly shredded block cheese to prevent a grainy or oily sauce.
  • Reserve starchy pasta water to loosen the thick sauce before baking.
  • Use just a pinch of nutmeg. A little bit goes a long way. You can always add more to taste at the end.
  • Make ahead: Roast and blend the squash up to 3 days in advance, or assemble the unbaked dish without breadcrumbs 1 day ahead.
  • Storage: Keep leftovers in an airtight container in the fridge for 3 to 4 days.
  • Freezing: Freeze baked portions for up to 3 months, thaw overnight in the fridge.
  • Reheat at 350°F in the oven for larger portions, or in the microwave with a splash of milk for smaller portions.
  • Stovetop: Skip the baking step and serve immediately for a creamy stovetop version.
 
Substitutions and Variations
  • Swap the fresh squash for 1½ cups of canned butternut squash puree.
  • Other cheeses: Gruyère, fontina, or white cheddar.
  • Mix in crispy bacon, pancetta, or sautéed spinach.
 
Disclaimer: Nutritional values (per serving) are approximates only.

Nutrition

Calories: 439kcal | Carbohydrates: 33g | Protein: 13g | Fat: 29g | Saturated Fat: 16g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 9g | Trans Fat: 0.3g | Cholesterol: 75mg | Sodium: 627mg | Potassium: 360mg | Fiber: 2g | Sugar: 4g | Vitamin A: 6811IU | Vitamin C: 13mg | Calcium: 281mg | Iron: 1mg