Whoopie Pies

Cake:
2¼ cups flour
⅓ cup cocoa powder
1½ tsp baking soda
¼ tsp cream of tartar
½ tsp salt
12 tbsp butter, melted
1¼ cups sugar
2 large eggs
1 tsp vanilla
1 cup whole milk

Filling:
1 stick butter, softened
1¼ cup confectioners sugar
1 jar Marshmallow Fluff
1 tsp vanilla

Preheat oven to 350 degrees. Line cookie sheets with parchment paper.

In a medium bowl, whisk together flour, cocoa powder, baking soda, cream of tartar and salt and set aside. In another medium bowl, mix melted butter and sugar on medium speed, about 3 minutes. Beat in eggs and vanilla until well combined.

Turn mixer to low and alternate adding dry ingredients and milk until just combined. Scoop 2 tbsp batter onto prepared sheets about 2“ apart and bake until toothpick comes out clean, about 12 minutes. Let cool completely.

Meanwhile beat together butter and confectioners sugar at medium speed. Add vanilla and Marshmallow Fluff and beat until smooth.

To assemble pies:
Spread filling on flat sides of half of the cakes and top with remaining cakes.