This Warm Vichyssoise Soup is a vintage potato soup recipe, much like cream of potato soup. It's a French-inspired creamy and velvety soup that is deliciously special and even elegant. Plus, it can be made in 15 minutes or less.
In a medium Dutch oven or soup pot, melt the butter over medium-high heat. Add the minced shallots and saute until soft and cooked; 2 to 3 minutes.
Pour in the broth, salt, nutmeg, and red pepper flakes, if using, and bring to a boil. Remove from the heat and whisk in instant potato flakes, stirring until fluffy. Gradually stir in the milk and the cream.
Return the pot to the stove and reheat as needed.
Spoon into small serving bowls and sprinkle with chives or watercress.