While a blender and food processor are similar at first blush, they are used for distinctly different kitchen and cooking jobs. A food processor can't do the work of a blender, nor can a blender do the work of a food processor: They're not interchangeable. Blenders generally have one fixed blade designed to puree or whip ingredients into a liquid or smooth paste. Classic examples are smoothies, soups, sauces and nut butters. Food processors, on the other hand, generally have a set of blades for different tasks -- they're best when they step in for your knife. Most food processors can chop, dice and mince. They can also grate and shred if you need a lot of cheese or are making coleslaw from scratch. While they won't do each other's tasks well, you can buy blenders with food processor attachments, including this $173 Ninja MegaSystem (includes blender) or this $200 Vitamix food processor attachment (does not include blender) that works with Ascent and Venturist models.