It is a two-step stamp set which means multi-layering of stamping to give lots of dimension.
It also is a photopolymer stamp which means you can see through it to easily line up the layering of stamping.
For the two-step stamping (really three), the images are labelled 1,2 and 3, but I prefer to stamp 3,2,1.
Also, to begin with choose one colour for the frosting and choose another colour for the case. Stamp off for a lighter shade in layers 3 and 2. Stamp in full strength for the top layer.
For example use Crumb Cake for the cases of the cupcakes in picture. For the frosting the first cupcake would use Daffodil Delight, the second Melon Mambo and Pool Party for the last. You could
also stamp different ink combo's.