When I need official information, I google the question and go down the search entries until I see one from fda, .gov, egg board, dairy board, .edu, irs.gov, etc. This tells me that it is an official site. Many of the search results in any subject are just opinions. But unless you look closely, you won't know if your information is official or scientifically correct. This is especially important in food safety issues. If you can't find it, it may have been in my FDA application. You can get this information from the Dept of Ag in your state. Even if you never want an FDA kitchen, there is a wealth of information that is available.
Don't get discouraged. This can be done. My "bakery neighbor" at my other house on MD's Eastern Shore is nationally recognized for her cakes and shipping is her main form of sales. Her cakes were featured in the movie, The Help, and on numerous national TV shows.http://www.carolinescakes.com/
But it is difficult and expensive if you don't purchase the supplies in bulk and have this as a normal business operation.