Old Fashioned Peanut Butter Sheet Cookies
["1 c. shortening", "1 c. peanut butter", "1 c. packed brown sugar", "1 c. sugar", "2 eggs, beaten", "2 1/2 c. flour, sifted", "1 tsp. soda", "1 tsp. baking powder", "1/4 tsp. salt"]
["Optional:", "You can add M&M's, Reese's pieces or butterscotch chips or all of these."]
["shortening", "peanut butter", "brown sugar", "sugar", "eggs", "flour", "soda", "baking powder", "salt"]