I made all my stuff at home, and my mom made her stuff in her home. We didn't have it inspected or anything, and we didn't put up warning signs for the goods that contained nuts, eggs, etc. We do have clean kitchens, tho, so I'm certain no one was made sick b/c of us!
The craft show we went to was in rural Missouri, and nobody really cared about the technicalities. I had read up on how you're supposed to make food items to sell to the public, and for that reason my mom didn't make fudge (the raw eggs). And when we got there, everyone was asking for fudge b/c the fudge lady didn't come that yr! So, what little attn we did pay to the rules we're throwing out this yr!
We made muffins, rice crispy treats, 5" and 9" pies (I used a spring form pan for the 5" pies), cookies, cakes, quick breads, and I made tiny little "pie bites" which all sold immediately. Basically, I cut out tiny pie crusts using a small glass and tucked them into my mini muffin pan and filled them with pecan, apple, and pumpkin pie fillings and baked them. Those were the most popular thing of mine that sold, and my mom's muffins were the most popular thing of hers. However, they were a lot of work and I was only able to do it b/c that was before dd was crawling! I'd recommend pre-made phyllo pastries! lol
I made all my stuff from scratch, but my mom used mixes for her muffins. The blueberry sold the best. We only had a few things left when we went home, but not much at all. All my pies sold (I think I made 15 altogether; 8-9" and 7-5", or something like that) except one that had gotten a little overdone. Mom's cookies were a real hit--oatmeal and chocolate chip cookies, I think, and she made cake cookies that did well, too. I made these beautiful, ornate lemon-filled sandwich cookies topped with chocolate and nuts--they were amazing!--but they didn't sell at all. So, I'd recommend keeping it fairly simple and sticking with what people think of as their favorites. Banana bread, cookies, muffins, pies. We didn't make cupcakes, so I don't know how well they'd do.
Go to a bakery and charge at least what they do. You can always come down at the end of the day if you've got leftovers that you can't get rid of. Oh yeah, and I made dozens of cut-out shortbread cookies, and NONE of them sold, so at the end of the day I gave away cookies to everyone at the show. That was actually fun!