A license is required to sell most kinds of foods. (For execptions to this, see the question on the Pickle Bill on the FAQ page.) Depending on the type of food sold and where it's sold, licences may be issued by the county health department or the Wisconsin Department of Agriculture Trade and Consumer Protection (WDATCP). The publication, Starting a Food Business (link below) from UW-Extension, provides information on licensing and training. You can also contact the WDATCP directly at 608-224-4682 or the Bayfield County Health Department at 715-373-6109.
Starting a Food Business