Mom'S Best Chocolate Chip Cookies
["2/3 c. shortening", "2/3 c. butter or margarine, softened", "1 c. granulated sugar", "1 c. brown sugar, packed", "2 eggs", "2 tsp. vanilla", "3 c. flour", "1 tsp. soda", "1 tsp. salt", "1 c. chopped nuts (optional)", "2 (6 oz.) pkg. semi-sweet chocolate pieces"]
["Heat oven to 375\u00b0.", "Mix thoroughly the shortening, butter, sugars, eggs and vanilla.", "Blend remaining ingredients.", "(For a softer, rounder cookie, add 1/2 cup flour.)", "Drop dough by rounded teaspoonfuls 2 inches apart onto ungreased baking sheet.", "Bake 8 to 10 minutes or until light brown.", "Cool slightly before removing from baking sheet.", "Makes about 7 dozen cookies."]
["shortening", "butter", "sugar", "brown sugar", "eggs", "vanilla", "flour", "soda", "salt", "nuts", "semi-sweet chocolate pieces"]