Chocolate Chip Shortbread Cookies

Chocolate Chip Shortbread Cookies 1/2 c. margarine 1/2 c. butter flavor Crisco 1/4 c. powdered sugar 1/4 c. light brown sugar 1/4 tsp. salt 2 c. all-purpose flour 1 c. chocolate chips Cream margarine and Crisco until smooth. Gradually blend in both sugars and salt. Work in flour, a little at a time, until thoroughly blended. Batter will be very stiff. Gently blend in chocolate chips. Grease a 15"x10" cookie sheet. With greased hands, spread dough evenly to fill cookie sheet, and work into a uniform thickness. Bake at 350F for 20 to 25 minutes, or until golden brown. Cut with a pizza cutter while still warm.