METHOD: 1. PREPARE CAKE ACCORDING TO DIRECTIONS ON BOX. 2. ADD PEANUT BUTTER AND CHOCOLATE CHIPS TO LAST STAGE OF MIXING. 3. PLACE CAKE BATTER ON SHEET PANS AND BAKE AT 300 DEGREES FOR 15 TO 18 MINUTES IN A CONVECTION OVEN. IN A STANDARD OVEN, COOK FOR 17 TO 20 MINUTES AT 350 DEGREES. 4. COVER CAKE WITH ICING. 5. CUT AND SERVE. SHEET PAN 6X10.