Rolled FondantFondant is very popular in wedding cakes. It is made out of sugar and very little shortening. It acts like play dough and is easy to mold into decorations. It can also be rolled to create a perfectly flat surface and makes the cake look very neat and professional. It holds its shape well and also keeps moisture inside the cake so that it doesn't dry out.
Rolled ChocolateCreates a similar effect to fondant but is great for chocolate lovers.
ButtercreamAnother popular choice in wedding cakes: it is made out of butter and sugar. It is argued that it tastes better than fondant, however it can also melt easier and is not good for hot climates. Buttercream can come in flavors including French, chocolate, and white chocolate.