Sharp white cheddar and chives add extra flavor to these simple drop biscuits.
Preheat oven to 425 degrees with racks in upper and lower third positions. Line two baking sheets with parchment.
In a large bowl, whisk together flour, baking powder, baking soda, sugar, salt, and cayenne pepper. Work butter into flour mixture with a pastry cutter or your fingers until butter is incorporated and pea-size lumps remain. Stir in cheddar, then buttermilk and chives, just until dough comes together.
Using two spoons, drop 1/4 cup quantities of dough onto prepared baking sheets, spaced 2 inches apart.
Bake in oven until golden brown, 12-14 minutes, rotating baking sheets once.