I'm a newbie to the site (visited many many times but just recentrly joined), but I've had a pation for the smoker and cooking in general for a long time. If you like spicy, try this. Small batch first then go from there.
1/4 cup thin sliced and diced white onion
1/8 butter (salted or not, doesn't matter)
2-3 teaspoons chili oil (start with 2- want more spice , add the 3rd)
1 tsp cayenne pepper powder
1 cup ketchup
2 tblsp Sriracha Chili Sause (found in chinese isle in the grocery store. Has a green cap on it)
black pepper (for good speckle affect)
3 tblsp of worcestershire sauce
salt to taste
Cook onions in butter and chili oil until onions are clear and very soft. Low heat. Don't caramelize them.
Once onions are ready, add everything else. Cook on low heat, stir frequently until it's hot. Always taste it. Worcestershire sauce is usualy what I add after everything is done. Sometimes spices. I like it hot and spicy.
This a good base sauce that I've worked on over the years. It's been a great spring board for experimentation and adding different indregients for different tastes.
Good luck!!