Lancaster, Wisconsin. Martha McLean enjoyed making her signature Hot Mustard years before she started selling it. Once she was convinced it would be a successful business, she and her husband Maury remodeled their kitchen so Martha had a bigger space to make her mustard. Martha started selling her mustard to local businesses and restaurants before expanding to national distribution with WisconsinMade. Today, Martha and Maury own and operate Martha's Hot Mustard alongside a bed and breakfast.