Poppy Seed-Buttermilk Biscuits

• 2 cups unbleached all-purpose flour
• 2½ teaspoons baking powder
• 1½

Position a rack in the middle of the oven and preheat to 450°F. In a medium bowl, sift together the flour, baking powder, sugar, and salt. Add the butter and blend quickly with a fork (or in a food processor) until it resembles coarse cornmeal. Add the buttermilk and mix and knead unti