Lightly spoon flour into a dry measuring cup; level with a knife.
Combine flour and next 3 ingredients in a bowl.
Cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Stir in grated Parmesan cheese and basil.
Add buttermilk, stirring just until moist.
Spoon dough evenly into 8 mounds on a baking sheet coated with cooking spray. Lightly coat tops of biscuits with cooking spray, and sprinkle with finely shredded Parmesan cheese.