Apple Spice Whoopie Pies Recipe

Ingredients

• 8 tablespoons (113g) unsalted butter, at room temperature
• 2 tablespoons (25g) vegetable oil
• 3/4 cup (149g) granulated sugar
• 3 cups (360g) King Arthur Unbleached All-Purpose Flour
• 1/2 teaspoon table salt
• 2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1 teaspoon cinnamon
• 1/2 teaspoon nutmeg
• 1/2 teaspoon allspice
• 1/4 cup (57g) buttermilk
• 2 large eggs, at room temperature
• 1 tablespoon (22g) boiled cider
• 1 cup (255g) applesauce, unsweetened
• 8 tablespoons (113g) unsalted butter, cold
• 1/4 teaspoon table salt
• 1/2 teaspoon cinnamon
• 4 cups (454g) confectioners' sugar, sifted
• 1/4 cup (46g) vegetable shortening
• 2 tablespoons (43g) boiled cider
• 2 to 3 tablespoons (28g to 43g) milk or heavy cream