Made primarily of sugar and water, fondant is often used for a decorative coating on cakes and cupcakes. The claylike consistency of fondant makes it possible to bend and mould it into almost any shape. A popular choice for wedding cakes is fondant lace, as it adds a elegant appearance. While it may appear that it takes a highly-skilled hand to produce fondant lace, it's possible for even the most amateur cake decorator to get good results.
Roll the fondant flat with a rolling pin. Fondant lace should be thin for the best appearance, no more than 1/8 inch / 3mm thick.
Lay the sheet of fondant on top of a lace mould. Press down firmly with the palms of your hands to keep the fondant in place.
Roll the fondant with the rolling pin to get an even lace impression from the mould.
Flip the mould over so the fondant is against the work surface. Pull the mould away from the fondant.
Trim any excess fondant off the sides of the lace impressions. A fondant cutter works well for this, but you can use a knife.