What Are Potatoes?
Potatoes are the number one vegetable eaten across the country and are one of the most versatile and nutritionally dense foods available. Originating in the Andean Mountain region of South America, once imported to Europe, they became a staple crop there and led to great population increases. Since the 16th century, potatoes have risen to become the fourth largest crop cultivated in the world behind rice, corn, and wheat. There are thousands of varieties known, though a handful are readily available for purchase.
Potatoes are broken into two distinct categories for cooking purposes: starchy and waxy. Starchy potatoes are great for frying and whip nicely to become fluffy and hold lots of flavorful ingredients like cream, butter, and roasted garlic. The starchy variety that is most widely available is the Russet potato. Waxy potatoes are those like Redskins, Yukon Golds, and White potatoes, which perform better in soups, stews, and other liquid applications because they hold their shape better, and do not crumble. This is a general rule, and there are certainly recipes where one is used where another kind might be typical.
Source: U.S. South Carolina Department of Education