Cream sugars and butter until the color changes to a lighter color. Add peanut butter mix well then beat in egg. Mix together the three cups of flour and 2 teaspoons of baking soda then add to the peanut butter mixture and mix until no flour streaks. You can refrigerate if you want or roll into one-inch balls and place on a baking sheet 2 inches apart. Use a fork to press in a cross hatch. Bake at 350 for 8-10 minutes