Preheat oven to 400°F. Spray a cookie sheet with cooking spray.
In a food processor, combine flour, baking powder, sugar, salt, garlic powder, baking soda, and cayenne.
2 cups all-purpose flour, 1 tablespoon baking powder, 1 teaspoon granulated sugar, 1 teaspoon salt, ½ teaspoon garlic powder, ¼ teaspoon baking soda, ¼ teaspoon cayenne pepper
Cut butter into tablespoon-size pieces. Add to the food processor and pulse until butter is pea-size.
½ cup cold butter
Add cheddar cheese and buttermilk; pulse until dough begins to clump.
1 cup shredded sharp cheddar cheese, ¾ cup cold buttermilk
Turn dough onto a lightly floured surface. Press to ½-inch thick, fold in half, and press out again. Repeat 2 more times.
Cut biscuits with a cutter or glass (do not twist).
Place on baking sheet and bake 12–13 minutes until golden.
Combine melted butter, garlic salt, and parsley. Brush over warm biscuits before serving.
3 tablespoons butter, ¼ teaspoon garlic salt, 1 tablespoon chopped parsley