This recipe calls for 2 types of lemon zest: fine zest and ribbon zest. A rasp grater (Microplane zester) is best for grating fine pieces of lemon zest for batters and frostings. Or, you can use the finest grate on a box grater. The ribbons, which are used for decoration, are made using a specialty ribbon zester. These can be found at most well-stocked discount stores. If you don’t have a ribbon zester, then sprinkle a little grated zest on top of the cake instead.