Preheat oven to 400°.
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 5 ingredients (through red pepper) in a bowl; cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Add 1/3 cup buttermilk and Parmesan cheese, and stir just until moist.
Turn the dough out onto a heavily floured surface; knead lightly 5 times. Roll dough to a 1/2-inch thickness; cut with a 2 1/2-inch biscuit cutter. Place biscuits on a baking sheet coated with cooking spray. Brush with remaining 1 tablespoon buttermilk. Bake at 400° for 15 minutes or until golden.