Gw2 Birthday Cake
The quaggan looks like it’s made of fondant, which, depending on how it’s made, is effectively sugar with a putty/clay-like consistency.
As a side thought though, you may be able to take two cupcakes stacked on top of each other and a pair of ladyfingers, with copious frosting, to sculpt a quaggan. (My sister did that to make Totoro a few years back.)