Nostalgic Whoopie Pies - Where The Food Comes From

Ingredients

• 1 cup packed dark brown sugar
• ½ cup shortening
• 1 large egg
• 2 cups all-purpose flour
• ¼ cup unsweetened cocoa powder
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1 teaspoon salt
• 1 cup milk
• 1 teaspoon vanilla extract
• 2 cups marshmallow fluff
• 1½ cups powdered sugar
• 1 cup shortening