Preheat oven to 350 degrees F (175 degrees C). Grease one 10x15 inch jellyroll pan.
Beat together the sugar, oil, pumpkin and eggs. Stir in baking mix, cinnamon and raisins; pour into prepared pan.
Bake at 350 degrees F (175 degrees C) for 25 to 30 minutes or until toothpick inserted in center comes out clean; allow to cool.
Prepare the frosting by beating together the cream cheese, 1/3 cup butter, milk, vanilla and powdered sugar. Spread frosting evenly over cake and cut into bars.
