Mmmm! Better than the real thing! Use my Tasty Cake recipe and make cupcakes instead. Let them cool completely.
Combine the filling ingredients in a mixer until fluffy:
1/4 cup butter
1/4 cup shortening
2 cups confectioners' sugar
1 pinch salt
3 tablespoons milk
1 teaspoon vanilla extract
Spoon filling ingredients in a pastry bag that is fitted with a decorating tip that's got an opening about 1/4" across. Stick the tip about 1/3 of the way into each cupcake center and squeeze the bag until it reaches the top of the cupcake.
Frost with the Tasty Cake Chocolate frosting and enjoy!