Chocolate Whoopie Pies

Ingredients

• 2 TBS flour
• 1/2 tsp salt
• 1/2 cup boiling water
• 2 3/4 cups all purpose flour
• 1 tsp vanilla extract
• 1/2 cup butter
• 1/2 cup sugar
• 1/2 cup cocoa powder
• 1 1/2 cups sugar
• 1 tsp baking powder
• 1/2 cup buttermilk
• 1 tsp baking soda
• 1/8 tsp salt
• 1/2 cup milk