IF the theory behind smoking is an absolute truth, a cold/room temp item absorbs smoke better than one that is warm/hot. So, an open casserole/jelly role pan will provide the greatest surface area for smoke absorption by the beans. Maybe too much smoke? Also might dry out unless you have an abundance of liquid. Then transfer to a sauce pan and heat to serving temp or if in a casserole, foil and bake in oven. Just my thoughts on the matter.