As a neutral spirit made from little more than alcohol and water, vodka can be distilled from all sorts of ingredients: corn, quinoa, and even old Twinkies. And if you know even a little bit about ...

John Hernandez, a bartender at Vickery Park, thinks he knows why potato vodkas don’t fare as well as those based on grain. “It’s a different flavor,” he explains. “People are just used to what they ...