Alright Dallas pay attention, butter is for toast, Miracle Whip is Salad dressing. What goes on a Mater sandwich is Duke's mayonnaise,period ! When I moved from SC to. AR you couldn't get it here . I thought I was going to have to do a Smokey and the Bandit style run to get it across the Mississippi. But luckily my father in law would mail or deliver a couple cases at a time and averted near disaster! Surely you have Duke's where you live? Who doesn't have Duke's mayo? Let me know I'll send you some...