Chocolate Whoopie pies and peanut butter filling

This was a more strange recipe, making it was fun yet messy for how sticky the batter is. It is difficult to put them on a pan and know when they were done, because you would use a whoopie pie pan {which I don't have} and that would supposedly make the cookie flatter and into the top of a cookie,...

You will want to start by mixing flour, cocoa, baking soda, baking powder, and salt together. Then grab your stand mixer with the paddle adjustment and mix together the butter on medium until soft and creamy. Add both sugars and beat until they are evenly blended. Add the egg and beat for 2 minutes. Then add in the vanilla. This...