1 c. brown sugar
1 c. granulated sugar
1/2 lb. butter
1 c. peanut butter
2 eggs
2 tsp. baking soda in 1 tsp. cider vinegar
1/2 tsp. vanilla
1 tsp. salt
3 c. flour

Mix sugars, eggs and peanut butter together. Add soda to 1 teaspoon cider vinegar and add to sugar mixture. Add vanilla. Mix flour and salt and add to sugar mixture. Roll dough into balls the size of walnuts and place on ungreased cookie sheet. Flatten with fork.

Bake at 350°F for 9 to 10 minutes.