In a medium-sized mixing bowl, lightly whisk together the egg and sugar.
Add the peanut butter and chocolate spread, stirring well to mix.
Chill the dough for 10 minutes.
While the dough is chilling, preheat the oven to 350 degrees.
Coat the bottom of a cookie sheet with cooking spray and set aside.
Remove the dough from the refrigerator and roll into 1½-inch balls. Place the balls about 2 inches apart on the cooking sheet.
Bake for 10 minutes, sprinkle the top of each cookie with sugar, and remove to a wire rack to cool.