In a bowl, combine the flour, sugar, baking powder, salt, and cayenne.
Cut in butter until mixture resembles coarse crumbs.
Add the cheese and toss.
Stir in buttermilk until just moistened.
Place on a lightly floured surface and knead about 10 times.
Pat or roll until the dough is about 1” thick, and cut with a floured 2-1/2” biscuit cutter.
Place 1” apart on an ungreased baking sheet.
Bake at 425° F for about 15 minutes, or until golden brown.