Potatoes are a New World crop. Developed in Peru and thereabouts, the Incas developed potatoes. Not all of them are edible for humans. They come in a variety of colors, including purple. But I digress.
Potatoes were still rare and not frequently planted. One story out of Colonial times says if a man ate potatoes he would not live seven years. During the 1790s more farmers were beginning to plant potatoes but they were still rare.
Potatoes were exported to England and were called Virginia potatoes. As we all know, they went to Ireland and became a staple in their diet. They returned to this country as Irish potatoes. A fashionable way of cooking them included butter, sugar and grape juice and then mixed with dates and lemons and seasoned with cinnamon and nutmeg. They were finally covered with a layer of sugar. Calorie overload!
More popular were sweet potatoes. It was roasted in the ashes, boiled, made into puddings, and eaten instead of bread. And of course, made into pie which tastes, like pumpkin.