Heat oven to 375°. Mix thoroughly shortening, margarine, sugars, eggs and vanilla. Stir in flour and chocolate chips. (For a softer, rounder, cookie, add additional 1/2 cup flour). Drop dough by rounded teaspoons 2-inches apart onto ungreased baking sheet. Bake 8 to 10 minutes or until light brown. Cool slightly before removing from baking sheet. Yields about 7 dozen cookies. (Optional:) Pour all cookie dough on large cookie sheet and bake 15 to 20 minutes or until browned. Cut into squares.
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