If a chef’s knife is the home cook’s best friend, then a food processor is his or her able assistant—ready to lend a hand whenever prep work proves daunting. These miraculous machines can chop mountains of produce at the flick of a switch, and puree soups, sauces, or smoothies in seconds. Are you a fan of making hummus? That’s reason enough to get a food processor. But which food processor? Among these high-quality models, the choice comes down to size: from a 14-cup powerhouse capable of feeding large households to a 3.5-cup mini model, ideal for singletons.