Method

1. Remove Krusteaz Professional RTB Chocolate Cake & Muffin batter from refrigerator. No slacking required.
2. Prepare 16x12x1-inch half-sheet pan by lightly greasing, lining with parchment paper and then lightly greasing the parchment paper. If using a pan extender (recommended), lightly grease the sides of the pan extender.
3. Cut open one end of the pouch and squeeze all of batter into prepared pan.
4. Spread batter evenly. Sprinkle walnuts, chocolate chunks and mini marshmallows evenly over top of batter.
5. For convection oven, bake at 300°F at low fan speed for 25-30 minutes, turning pan halfway through bake time. Allow cake to cool completely before cutting or removing from pan.