01 -
Melt 4 tablespoons of unsalted butter in a large Dutch oven or heavy-bottomed soup pot over medium heat. Continue to cook, swirling occasionally, until the butter foams and develops a golden brown color with a nutty aroma, about 3 to 4 minutes. Add 12 sage leaves and fry until crisp, about 1 minute. Remove the sage leaves with a slotted spoon and set them aside for garnish.
02 -
Add diced yellow onion, sliced carrots, and minced garlic to the brown butter. Sauté for 5 minutes until the vegetables are softened and fragrant.
03 -
Add the cubed butternut squash, kosher salt, black pepper, and ground nutmeg. Stir thoroughly to coat the vegetables with the butter and seasonings.
04 -
Pour in 4 cups of vegetable broth. Bring the mixture to a boil, then lower the heat and simmer uncovered for 25 to 30 minutes, or until the squash and carrots are fully tender.
05 -
Take the pot off the heat. Using an immersion blender, or working in batches with a countertop blender, purée until the soup is completely smooth and velvety.
06 -
Stir in the remaining 2 tablespoons of unsalted butter and 1 cup of heavy cream. Taste and adjust seasoning as needed.
07 -
Ladle hot soup into warmed bowls. Garnish with the reserved fried sage leaves, a swirl of crème fraîche or Greek yogurt, and toasted pumpkin seeds if desired.