This is actually an interesting question. These three chocolate bars are all produced by the same company and are very similar! In the US, we would call the bar in this recipe a Milky Way bar. If you are in Canada or other parts of the world, you would call this a Mars bar! If you aren't from the United States, the Milky Way bar you are thinking of is what we here call a 3 Musketeers bar. You could chop up either of these bars to go on top of this cake and they would both be delicious!