Mocha Whoopie Pies with Peanut Butter Filling – The Ranch Table

Ingredients

• 2 cups all-purpose flour
• 1 cup vegetable shortening
• 1 cup whole milk
• 1 cup dark brown sugar, packed
• ½ cup unsweetened cocoa powder
• 1 egg, room temperature
• 2 tablespoons espresso powder
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1 teaspoon vanilla extract
• ½ teaspoon kosher salt
• 4 cups confectioner's sugar, measured then sifted
• 1 cup unsalted butter (2 sticks), softened
• 1 cup unsalted creamy peanut butter
• 4 egg whites, room temperature
• 1 teaspoon kosher salt