For the cake: Pre-heat oven 350F and line a 12 cupcake pan with paper liners. Set a side. Beat butter and sugar until fluffy.Add eggs and vanilla, add the self risng flour until mix. Pour the mix into the cupcake liners.Bake for 20 minutes. Set a side until cool.
For the vanilla pudding :( just follow the instruccions in the box)
Chocolate ganache: in a sauce pan heat heavy cream, add chocolate stir until melt. Add the butter stir until well mix.Set a side.
Spoon vanilla filling into a pastry bag fitted with a medium-size plain tip. Fill cupcakes with vanilla pudding filling by inserting tip into top of cupcake and squeezing a couple of tablespoons of filling into each cupcake.