no i don't -- just wanna say congratulations on that
It would depend what they're using them for and how often. You could do a per-use charge or a flat fee, which is more common. Fine Art America has some information on basic licensing fees when you upload images, and the base rates range from $100 to $150 depending on whether they're using it in advertising, on packaging, etc.
A lot of magazines expect photos for free, though, so are you sure they want to pay you? Cake magazines, especially, don't generally pay for that kind of use of a cake photo. If you want to send me a private message with more details I might be able to help further depending on what the specifics are.
Any magazines I have had pictures in will credit my business so I take that as 'payment' if you will. It's great advertising...and you can say that your cakes have been featured in. x, y and z. I personally don't think they would pay you if it is a bridal mag etc because they don't need to...many bakers would give them the pictures for free. If they wanted to pay for them, they could just buy a royalty free stock image.
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