Peanut Butter Cookies
["1/2 c. butter or margarine", "1/2 c. sugar", "1/2 c. brown sugar", "1/2 c. peanut butter", "1 egg", "1/2 tsp. vanilla", "1 1/2 c. flour (all-purpose)", "3/4 tsp. soda powder", "1/2 tsp. salt"]
["Thoroughly cream butter, peanut butter, sugar, brown sugar, egg and vanilla. Sift in dry ingredients and blend into creamed mixture and shape into balls. Put on cookie sheet and bake 10 to 15 minutes at 375\u00b0."]
["butter", "sugar", "brown sugar", "peanut butter", "egg", "vanilla", "flour", "soda powder", "salt"]