Step 1

Preheat oven to 400 degrees. Spray a 12-cavity whoopie pie pan with nonstick spray. (We got ours on Amazon!)

Step 2

In a medium-large bowl, combine all cake ingredients. Add 2 tbsp. water, and mix thoroughly. (Batter will be thick.) Evenly distribute batter into the pan, and smooth out the tops.

Step 3

Bake until a toothpick or knife inserted into one of the pieces comes out mostly clean, about 10 minutes.

Step 4

Let cool completely, about 10 minutes in the pan and 15 minutes on a cooling rack.

Step 5

In a medium bowl, mix filling ingredients until uniform.

Step 6

Evenly top 6 pieces with filling. Top with remaining 6 pieces.