Chocolate Whoopie Pies with Quick Marshmallow Frosting

INGREDIENTS

15 oz

all-purpose flour (3 cups)

6 oz

unsweetened cocoa powder (1.5 cups)

1 tbsp

baking soda

1 tsp

baking powder

1/2 tsp

salt

1 cup

unsalted butter, at room temperature

1 1/2 cups

sugar

extra large eggs

2 cups

buttermilk, at room temperature (I use this powdered buttermilk, it's awesome!)

1 1/2 tsp

pure vanilla extract

3/4 cup

sugar

1 tbsp

white corn syrup

1/4 cup

egg whites (about 2 egg whites)

1/8 tsp

salt

1 tsp

pure vanilla extract