Bake the cake according to the directions on the box and allow to cool
Break the cake into small pieces and add to a large mixing bowl
Stir in 3/4 of the frosting container and mix well until it's fully blended into the cake. Make sure there aren't any clumps of frosting. You may need to use your hands
Spoon a bit of mixture out of the bowl, and roll into 2-inch balls, making a hole with your thumb at the top, and pushing a Hershey kiss inside, take another small piece of cake mixture and cover the whole, then roll into a ball and place on a parchment paper lined baking sheet. Place in the freezer for 30 minutes
Add the milk chocolate melting chocolate to a microwave-safe bowl and cook at 1-minute intervals until it's smooth and creamy, stirring in between.
Remove the bites from the freezer and drop them one at a time into the chocolate. Using a slotted spoon, remove them from the bowl and allow excess chocolate to fall off.
Place them back on the parchment paper lined baking sheet and freeze for one hour
Melt the white chocolate the same way as you did the milk chocolate and taking a small spoon drizzle it over the top of each bite.
Put back into the freezer for another hour before eating