BIRTHDAY CAKE CUPCAKES
 From the moist cake to the fluffy frosting, these scream  HAPPY BIRTHDAY! The perfect birthday cake flavor   - without the extra work that goes into a traditional cake!    PREP TIME :15 mins   COOK TIME :15 mins   TOTAL TIME :30 mins    Author: Tiffany  Recipe type: Dessert   INGREDIENTS:    1 box yellow cake mix  ½ cup greek yogurt (or sour cream)  ⅓ cup oil  ¾ cup buttermilk  2 teaspoons vanilla  3 eggs  frosting  ½ cup butter, softened  2 teaspoons vanilla  2 tablespoons heavy cream  3-4 cups powdered sugar  optional: sprinkles   INSTRUCTIONS :   1-Preheat oven to 325 and fill muffin tins with cupcake liners.   2-Sift cake mix into a medium bowl. In a larger bowl combine, greek yogurt (or sour cream), oil, buttermilk, vanilla, and eggs and whisk until smooth. Add cake mix and mix until smooth. Fill cupcake liners ¾ full and bake 13-18 minutes until an inserted toothpick comes out clean.   3-After cupcakes have cooled completely, cream the butter for two minutes in a large bowl....