Duke's mayo jars like these have become collectors' items. C.F. Sauer Company hide caption toggle caption C.F. Sauer Company The Salt Worth The Whisk: How The Woman Behind Duke's Mayo Became A Tycoon June 7, 2018 Long a Southern staple, Duke's Mayo is racking up converts among professional chefs across the U.S. But few know the surprising backstory of Eugenia Duke, the woman behind the century-old brand.