Whoopie Pies

1 18.25 oz pkg devil's food cake mix
5 TBS all-purpose flour
1 c milk
1 c shortening
1 c white sugar
2 tsp vanilla extract

Preheat oven and prepare cake mix as directed on package except using only 3/4 c of water. Drop batter onto greased cookie sheet (or use parchment paper to line pan) in 2 1/2 to 3 in circles. Bake until toothpick inserted in center comes out clean. Let cool.

Meanwhile, in a saucepan, combine milk and flour and cook, stirring constantly until it forms a thick paste. Let cool.

Meanwhile, in a medium bowl, beat sugar and shortening until fluffy. Add vanilla. Add cooled flour mixture and beat until double in volume.

Turn the little cakes over on their backs. Spoon a dollop of filling onto half of the little cakes. Place the other half of the cakes on top of the filling to form sandwiches.