
Is a yam orange? Is a sweet potato white? Or are they both orange? Yellow? Pink, purple, dark brown? If you've visited a well-stocked supermarket, you've seen all of these colors. But are they sweet potatoes or yams?
A true yam is not related to the sweet potato. They are tropical tubers with crisp, bland, whitish-yellow flesh. Unless you are in the tropics, it's more than likely that what you're purchasing is a sweet potato, even if it's labeled a yam. Yes, even those cans that say Yam in big letters are sweet potatoes.
Sweet potatoes can be orange-fleshed, yellow-fleshed, large, small, short, long, tan-colored, brick-red, dry, moist, sweet, or bland. They are what you will find in every mainstream supermarket in the U.S., not yams.