Preheat oven to 350 degrees. Line a muffin pan with paper cupcake liners
In a large bowl, combine cake mix, milk, melted butter, and eggs.
Beat until smooth (either with a hand mixer or by hand).
Fill cupcake liners about 2/3 full.
Bake according to cake mix box instructions for cupcakes
Remove from oven when they are baked through and allow to cool completely.
Using a cupcake corer ( or a knife) remove some of the cake from the center of the cupcake – don’t go all the way down to the bottom. You want your filling to stay inside the cupcake.
Take pudding from refrigerator and spoon into a piping bag with a large tip or use an plastic re-sealable bag and snip the corner off.
Pipe in pudding into each cupcake to the top.