Duke Sandwich: Tradition Stands the Test of Time... Mama always said, "If it ain't broke, don't fix it!" She also taught me that mayonnaise is not mayonnaise unless it's Duke's. It saddens me to know the actions that prompted this post. If you grew up in Greenville, like me, you're familiar with Duke's and know that it's made at C.F. Sauer Company on Laurens Road. Native … [Read more...] about DUKE SANDWICH: TRADITION STANDS THE TEST OF TIME