Whisk together first 3 ingredients in a large bowl.
Cut in shortening with a pastry blender until mixture resembles small peas and dough is crumbly; stir in cheese.
Add buttermilk, stirring just until dry ingredients are moistened.
Turn dough out onto a lightly floured surface; knead 3 to 4 times.
Place dough in a bowl; cover and chill 1 hour.
Preheat oven to 35
Turn dough out onto a lightly floured surface. Pat or roll dough to 1-inch thickness; cut with a 1 1/2-inch round cutter, and place on parchment paper-lined baking sheets.
Bake at 350 for 20 to 22 minutes or until golden brown.