Whoopie Pies with Espresso Cream | The Ninja Baker

Ingredients

• 2 cups plus1 tablespoon all-purpose flour
• ½ cup unsweetened cocoa powder
• 1 teaspoon baking soda
• 1 teaspoon salt
• 1 cup sugar
• ¾ cup softened, unsalted butter
• 2 large eggs
• 2 teaspoons vanilla extract
• ¾ cup milk (coconut milk works, too)
• ½ tablespoon espresso powder
• ¼ cup warm water
• 1 ½ cups marshmallow fluff
• 1 teaspoon vanilla extract
• 1 ½ cups powdered sugar