Cut shortening into flour with a pastry blender or fork until crumbly. Add buttermilk, stirring the mixture just until moistened.
Pat dough to 1/2-inch thickness; cut with a 2-inch round cutter. Place on a lightly greased baking sheet.
Bake at 425° for 14 minutes or until golden. Brush the hot biscuits with melted butter, if desired.