chocolate tiramisu whoopie pies

Ingredients For chocolate tiramisu whoopie pies

• 1 c

  shortening
• 1 1/2 c

  sugar
• 2

  eggs
• 2

  egg yolks
• 1 c

  buttermilk
• 1 c

  hot coffee
• 3 tsp

  baking soda
• 1 tsp

  baking powder
• 1/2 tsp

  salt
• 4 c

  unbleached flour
• 1 c

  dark baking cocoa
• FILLING
• 2

  egg whites
• 2 tsp

  vanilla extract
• 4 Tbsp

  unbleached flour
• 4 Tbsp

  milk
• 1 1/2 c

  shortening
• 8 oz

  mascarpone cheese
• 3 c

  powdered sugar