Directions

1. Preheat oven to 375 degrees. Line a baking sheet with a Silpat (French nonstick baking mat) or parchment paper; set aside. In a medium bowl, whisk together flour, baking powder, baking soda, salt, and sugar.
2. Transfer about 2 1/2 cups flour mixture to a food processor fitted with the steel blade. Add butter, and pulse until the largest pieces are the size of peas. Return butter mixture to the bowl with the flour mixture. Use your fingers to combine.
3. Add buttermilk, and stir just until mixture comes together; the batter will be sticky. Transfer to lightly floured work surface; use floured fingers to pat dough to 1-inch thickness. Use a 2 1/2-inch round biscuit cutter or cookie cutter to cut biscuits as close together as possible to minimize scraps. Gather scraps together once, pat together and flatten, and cut out.
4. Transfer biscuits to prepared baking sheet; bake until lightly browned, 18 to 20 minutes. Remove from oven; cool on a wire rack. Serve warm.