Butternut squash soup is the perfect comfort food recipe for cooler fall and winter months or just anytime the craving for butternut squash soup strikes! This soup recipe starts with roasted butternut squash for deeper flavor in the finished product.
Preheat oven to 350 degrees F. In a large shallow roasting pan, toss together squash, oil, 1 teaspoon salt, and 1/2 teaspoon pepper. Roast, uncovered, about 1 hour or until tender, stirring once.
Meanwhile, in a 6- to 8-quart Dutch oven, cook onion in hot butter over medium-low heat about 20 minutes or until golden brown, stirring occasionally.
Add roasted squash and broth. Bring to boiling; reduce heat. Simmer, uncovered, for 15 minutes. Cool slightly.
Transfer squash mixture, in batches, to a blender; cover and blend until smooth. Return pureed mixture to Dutch oven. Season to taste with additional salt and pepper. If desired, garnish each serving with chives.