1 - 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.
2 - Turn dough out onto a lightly floured surface; knead 3 to 4 times. Place dough in a bowl; cover and chill 1 hour.
3 - Preheat oven to 350F. 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.
4 - Bake at 350F for 20 to 22 minutes or until golden brown.
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