Not sure which forum I read about someone cold-smoking butter, but last night I ran the Bradley for a cold smoke, filled the smoker up with haddock, salmon, cheese, garlic and coarse salt, and added a pack of butter as an experiment.
Obviously smoking temperatures are a lot more important when trying to smoke butter, all I did was open out the paper wrapper and leave the butter on the wrapper. We did about an 8-hour smoke using mesquite, just had a taste test on a piece of toast. YES! That works very well indeed. I would imagine the butter would be very good on baked potatoes, steamed veggies, fish or other meats.