It can take years to perfect a new taste. A successful flavor—a tangy citrus for gum, a zesty spice for chips—can earn millions of dollars. No wonder flavor companies guard their formulas with such care.
But what makes a flavor “good”? Why do we love some tastes and not others?
Check out your tongue in a mirror. That slimy pink blob is a great flavor-detecting tool. You have 10,000 taste buds on the insides of your cheeks and on your tongue. They can sense five different flavors. These flavors are sweet, sour, salty, bitter, and umami, which is a rich flavor, like meat or cheese.
Our power to sense flavors is a survival tool. Thousands of years ago, when people hunted and gathered food in the wild, a quick taste could tell them whether a food was edible or deadly. A bitter berry? It will kill you! That sour hunk of buffalo meat? Bleh, it’s rotten!
Yet our tongues play only a small role in how we sense flavor. Ever wonder why food tastes bland when your nose is stuffed up? It’s because your tongue is pretty lost without your nose. The tongue knows whether a food is sweet or bitter. But it takes both taste and smell to tell your brain whether that ice cream you’re eating is chocolate or vanilla.