1Heat oven to 350°F. Generously grease 10-inch ovenproof skillet with shortening. In large bowl, beat butter, brown sugar and granulated sugar with electric mixer on medium speed 2 minutes or until light and fluffy. Beat in egg and vanilla. On low speed, beat in flour, baking soda and salt until blended. Stir in oats, cranberries and chocolate. Press dough in bottom of skillet.
2Bake 40 to 45 minutes or until golden and set (do not overbake). Cool on cooling rack 20 minutes; cut into 10 wedges. Serve warm or cool with ice cream and hot fudge topping.