Well, I guess I am not a preferred American speller. I have always spelled the 'f' word, no matter the context, with two Gs (speaking of which a couple of Gs would help pay my current bills, but I digress). But my American Heritage Dictionary lists single G first

I most often have used the word to denote kindling, occasionally to denote homosexual males (but not recently), infrequently to mean cigarettes, but never, never to denote food. Having read those recipes, I may never be able to use the 'f' word with either G or GG again. The mind picture is too gross.