WHO WE ARE. Founded in 1973 by Phillip J. Sass, Wisconsin Spice, Inc. has grown from humble beginnings, and today is regarded as a global power in the mustard industry. Sass started Wisconsin Spice, Inc., amidst a global mustard shortage, in an abandoned, 19th century feed mill. From humble beginnings, Sass constructed a 130,000 sq. ft. manufacturing facility which produces dry-milled mustards and prepared mustards, serving multiple distribution ...