Fondant icing gives a cake a professional look that can not be achieved with spreadable frosting. A fondant design can lose that professional touch if there are visible traces of sugar, corn starch, or other debris on the surface of the cake. Since fondant is pliable, you can not simply wipe off debris without denting the cake. Luckily, cleaning a fondant cake is possible if you use a few simple techniques.
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Wash your hands and remove any rings or jewelry that might dirty your fondant. Make sure your apron and other clothing are free of any dust or food particles. Roll up your shirt sleeves to ensure that they don't leave any debris on your fondant.
Do not flip over your fondant after rolling it. The underside of the fondant will be coated with powdered sugar or corn starch, depending on what you choose to use. These fine granules are difficult to neatly remove from fondant, so be careful not to let the top side of your rolled fondant come in contact with the cutting board or counter top.
Buff the rolled fondant with the palm and heel of your hand to smooth out any imperfections. Rub it softly in a circular motion. Do not press too hard or you will flatten the fondant. The natural oils in your skin will give the fondant a smooth and shiny texture, and your hand will also pick up any stray pieces of sugar or starch.
Roll a small piece of extra fondant into a ball. Gently press the ball onto your rolled out sheet of fondant to pick up any pieces of debris that are on the surface. Be careful not to press too hard so that you don't dent or damage the fondant's surface.
Fill a small spray bottle with vodka. Once you have put the fondant on the cake, lightly spray the finished cake with the vodka. As the vodka evaporates, any excess sugar or corn starch will disappear, and the fondant will remain shiny.