I've been smoking ribs for years and have just started in with the bigger cuts. I've done two briskets and today I'm trying a Boston Butt for the first time. I like to try oddball marinades and rubs but am not sure what makes the best bark. I lean towards spicy and sweet. Any suggestions? It is smoking now with a rub made with some seasonings and coffee grinds (tasted awesome on the brisket) but I was thinking of finishing at the end with a little jalapeno relish and brown sugar. Any input?