Prepare cake as instructed. Cool the cake completely (I did it overnight) and them crumble it. You should be left with a big pile of crumbs.
Next, add the frosting and mix to incorporate (Note: I added the frosting about a 1/2 cup at a time, and good thing I did too because I only ended up needing just over a cup and not the whole container. The amount of frosting probably depends on the cake you use as brands vary). The mix should be uniform and slightly sticky, but not complete mush.Roll into bite-sized balls and chill for several hours.
Melt the chocolate in a bowl and dip each ball in individually. Allow to set on parchment paper, which only takes a few minutes. Decorate as desired.Like I said, this is the most basic instructions and if you plan on making these, I highly encourage you to look at the links. They have a lot of very helpful (and necessary) tips.