# What You'll Need:
→ Chocolate Whoopie Pies
01 - 1 2/3 cups all-purpose flour
02 - 2/3 cup unsweetened cocoa powder
03 - 1 1/2 teaspoons baking powder
04 - 1/2 teaspoon baking soda
05 - 1/4 teaspoon salt
06 - 1/2 cup unsalted butter, softened
07 - 1 cup granulated sugar
08 - 1 large egg
09 - 1 teaspoon vanilla extract
10 - 1 cup whole milk
→ Coffee Mascarpone Filling
11 - 8 ounces mascarpone cheese, chilled
12 - 1/2 cup heavy cream, cold
13 - 1/2 cup powdered sugar, sifted
14 - 1 tablespoon instant espresso powder
15 - 1 tablespoon hot water
16 - 1 teaspoon vanilla extract
→ Assembly
17 - Unsweetened cocoa powder, for dusting
# How To Make It:
01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, cocoa powder, baking powder, baking soda, and salt until evenly distributed.
03 - In a large bowl, beat together softened butter and granulated sugar until light and fluffy, approximately 2-3 minutes.
04 - Beat in egg and vanilla extract until fully combined.
05 - Gradually add dry ingredient mixture to wet mixture, alternating with milk in three additions, beginning and ending with dry ingredients. Mix until just combined to avoid overmixing.
06 - Using a medium cookie scoop or tablespoon, drop 24 mounds of batter onto prepared baking sheets, spacing approximately 2 inches apart.
07 - Bake for 10-12 minutes, or until cakes spring back lightly when touched. Cool on pans for 5 minutes, then transfer to wire rack to cool completely.
08 - Dissolve instant espresso powder in hot water and allow to cool completely.
09 - In a bowl, beat together chilled mascarpone, cold heavy cream, and sifted powdered sugar until smooth and thick, taking care not to overbeat. Fold in cooled espresso and vanilla extract until just combined. Chill for 20 minutes if filling is too soft.
10 - Spread or pipe generous dollop of coffee mascarpone filling onto flat side of half the cooled cakes. Top with remaining cakes to create sandwiches.
11 - Dust tops with unsweetened cocoa powder. Refrigerate for 30 minutes before serving to achieve optimal texture.