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Export 6 ingredients for grocery delivery
Step 1
Trim and thinly slice scallions; set aside 1⁄2 cup in a small bowl for garnish, and cover with plastic wrap.
Step 2
Melt butter with olive oil in a medium heavy-bottomed pot over medium-low heat. Add scallions, and cook, stirring often, until soft but not browned, about 20 minutes. Add potatoes and chicken stock, and bring to a boil over medium-high heat. Reduce heat to medium-low, and simmer until potatoes begin to disintegrate, 35-40 minutes. Season to taste with salt and pepper.
Step 3
Allow soup to cool slightly; then puree in an electric blender or food processor until smooth. Stir in cream, mixing in thoroughly, and adjust seasonings. Serve hot or cold, garnished with reserved scallions.