Ingredients
2 cups sugar
1 vanilla bean, halved with scraped seeds
5 plums, quartered, pitted
1/2 cup buttermilk
1 1/2 cups small ice cubes
Preparation
Put 4 cups water, sugar, and halved vanilla bean with scraped seeds into a large saucepan. Bring to a boil over medium-high heat, stirring until sugar has dissolved. Add plums. Reduce heat to medium-low, and simmer until plums are tender, about 15 minutes. Using a slotted spoon, transfer plums to a plate to cool completely; remove bean, and discard poaching liquid.
Puree cooled plums in a blender. Add buttermilk and small ice cubes; blend until smooth.
