Preheat oven to 350 degrees F. Lightly grease baking sheets.
Beat together the whipped topping and softened peanut butter so that it mixes with the cool whip; beat the eggs and add to the coolwhip. Add the yellow cake mix and continue to mix. Dough will be thick.
Drop by teaspoonfuls into a bowl of confectioners' sugar and roll to coat. Place cookies on the prepared baking sheets. Bake at 350 degrees F for 8 minutes