The first step to decorating any cake is to frost it. Remember, when frosting cakes, wait until they are completely cool. If the cakes are warm, the butter in the frosting will melt and make a mess.
A large icing spatula is the best tool for frosting sheet cakes. You can frost a sheet cake after taking it out of the baking pan, or just frost the top if you plan to leave it in the baking pan.
Frosting a Sheet Cake Out of the Pan
Frosting a Sheet Cake in the Pan
Once you know how to make a smooth-frosted cake, you have a blank canvas for some super-fun decorations. Here are some of our favorite ways to dress up sheet cakes.
Decorating a Sheet Cake Out of the Pan
Decorating a Sheet Cake in the Pan