This is simple and very forgiving as far as the ingredients go.
I do a pound of cooked ground beef and a large can of Bush's Original baked beans (not the huge can, but roughly the size of two or three normal size cans...not sure how many oz that is...)
Mix those and then add:
Mustard, Ketchup, Worcestershire Sauce, Molasses, and Brown Sugar. I always just wing the amounts, but typically I squirt/pour the liquids in a line down the length of a long baking pan and call that enough and then maybe 1/2 to 1 cup of the brown sugar. Stir all of those in.
Bake or smoke that at around 300 until its reduced to the thickness that you want (if you like it juicy, take it out sooner, and if you like it thick leave it in longer.
I've found that when smoking, you would only be able to get smoke flavor on the top (it's not going to smoke through the pan), so you will probably want to plan on storing it often if you want to incorporate some smoke flavor. I've only done it once and I didn't stir. If there was any smoke flavor (couldn't really tell a difference since all of the other flavors are so strong) it was on the top.
I'm doing this exact recipe this weekend, but I'll probably do it in the oven. Let us know what you do and how it turns out...