Classic Whoopie Pies Recipe

Ingredients

• 1/2 cup unsalted butter, softened
• 1 cup granulated sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 2 cups all-purpose flour
• 1/2 cup unsweetened cocoa powder
• 1 teaspoon baking soda
• 1/4 teaspoon salt
• 1 cup buttermilk
• 1/2 cup boiling water
• 1/2 cup vegetable shortening
• 2 cups powdered sugar
• 2 tablespoons milk