Take a lemon and slice it in half, then slice each half into about four sections. Coat each lemon in sugar. Pour yourself a shot of vanilla vodka but, before you take the shot, put the sugar-coated lemon in your mouth and squeeze out the juice and sugar. DO NOT SWALLOW. Keep the juice in your mouth and take the shot; it should taste just like cake (I don't know why they call it German Chocolate Cake, but hey, I learned this at a frat...)
Some people prefer to chase the shot with the lemon/sugar, so feel free to try that as well...