Plan B - Use the Freedom of Information Act
I'm all for finding out the recipe, and hopefully it will be released (I can't imagine why it wouldn't be). However, is this really what FOIA was intended for? If the kit/ingredients were purchased with his personal money, it's probably not FOIA'able.
I'd read that the FOIA request probably won't work because it is not an official activity anyway, just as the chef's blueberry pie recipe wouldn't be FOIA'able either.