The ratio of ingredients kind of changes on my mood, I usually don't use much sugar because I like a tangy sauce. Dh likes sweet sauce so if I'm feeling generous I'll add a bit more of the brown sugar. Obviously ketchup is the base. This time I added some finely chopped onion.
I am using a 2.5 pound chuck roast. We are feeding my grandparents tonight. I just stick it in the crock pot, cover with sauce and let it cook on low for 8 hours. When it's done I shred it with two forks and throw it on some rolls (with slaw for those who like it).