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Butternut Squash Pasta Sauce

Butternut squash pasta sauce that turns cubed squash into a silky, golden-orange puree, then simmers with cream and parmesan for a smooth Italian-American main. Toss the sauce with rigatoni or penne and a splash of pasta water for a glossy coating.
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Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 4 servings
Course: Main Dish
Cuisine: Italian-American
Calories: 760
Ingredients Equipment Method Notes

Ingredients
  

Rigatoni or penne
  • 1 lb rigatoni or penne Use rigatoni or penne; reserve pasta water before draining.
Butternut squash base
  • 1 butternut squash Peel and cube (about 4 cups).
  • 1 onion Dice small for even sautéing.
  • 4 garlic Minced.
  • 3 cup vegetable or chicken broth Choose vegetable for vegetarian or chicken for richer flavor.
  • 2 tbsp olive oil For sautéing the aromatics.
  • 1 tbsp fresh sage Chopped.
  • 1 pinch nutmeg Use freshly grated if possible.
  • 0.25 tsp red pepper flakes Adjust heat to taste.
Creamy finish and sauce consistency
  • 0.5 cup heavy cream Adds creaminess after blending.
  • 0.5 cup parmesan, grated Add after simmering starts to help it melt smoothly.
  • 0.5 cup pasta water Use to thin the sauce and help it cling to pasta.
  • 1 salt and pepper To taste, added at the end.

Equipment

  • 1 large pot
  • 1 immersion blender

Method
 

Sauté aromatics
  1. Heat olive oil in a large pot over medium heat, then sauté the onion for 5 minutes until softened and translucent, stirring occasionally (visual cue: gentle browning at the edges).
  2. Add the garlic and chopped sage and cook for 2 minutes, stirring constantly to keep it fragrant but not browned (visual cue: aromatic bubbles around the garlic).
Simmer squash
  1. Add the cubed butternut squash and broth, then bring to a boil over high heat (visual cue: rapid bubbling across the surface).
  2. Reduce to a simmer and cook for 20 minutes until the squash is very tender when pierced (visual cue: cubes collapse easily with a fork).
Blend smooth
  1. Blend the mixture completely smooth with an immersion blender until silky (visual cue: no visible squash chunks and a uniform golden-orange color).
Make it creamy
  1. Stir in the heavy cream, grated parmesan, nutmeg, and red pepper flakes, then simmer for 5 minutes (visual cue: sauce thickens slightly and looks glossy).
Toss pasta and season
  1. Cook the rigatoni or penne according to package directions, then toss it into the sauce and loosen with pasta water as needed (visual cue: sauce coats the pasta evenly and clings).
  2. Season with salt and pepper to taste, then serve right away (visual cue: flavor is balanced and the sauce looks smooth and cohesive).

Notes

For ultra-silky texture, blend right after simmering while the squash is hot and soft; if it seems too thick, loosen with extra pasta water by the tablespoon. Store leftovers in an airtight container in the refrigerator up to 3 days; reheat gently on the stove with a splash of water or broth. Freezing is not ideal because cream can separate after thawing, but you can freeze without the cream and add it when reheating. Dietary swap: use all vegetable broth and skip chicken broth for a vegetarian version.