Girl Scout Shortbread Cookies
["1/2 c. butter flavored shortening", "1 c. powdered sugar", "1/2 tsp. vanilla", "1/4 tsp. salt", "2 Tbsp. beaten egg", "1/2 tsp. baking soda", "2 Tbsp. buttermilk", "1 1/2 c. all purpose flour (plus an extra 1/4 cup reserved for rolling)", "1/8 tsp. baking powder"]
["In a large mixing bowl, cream together the shortening, sugar, vanilla and salt with an electric mixer.", "Add the egg and beat the mixture until it's fluffy.", "Add the baking soda and mix for about 20 seconds, then add the buttermilk and mix for an additional 30 seconds.", "In another bowl, combine the flour and baking powder. Pour dry ingredients into wet ingredients and mix well with an electric mixer until flour is incorporated.", "Roll the dough into a ball, cover it with plastic wrap and chill for 1 hour.", "Preheat oven to 325 degrees."]
["butter", "powdered sugar", "vanilla", "salt", "beaten egg", "baking soda", "buttermilk", "flour", "baking powder"]