I found this recipe in an old cookbook of my Mom's and can remember doing these with her when i was small. Now i make them with my little ones. A very quick and simple cookie that everyone loves. Sometimes we add a hershey kiss instead of the sugar sprinkles.
Preheat oven to 350. grease a large baking sheet, in a mixing bowl combine peanut butter, 1 cup sugar, egg, vanilla mix well. roll into balls of any size, placing them on the sheet. mash down with fork and sprinkle with remaining sugar.
Bake for 12 minutes.