Spinoff-Bud's Broilers Hickory Sauce

I've tried this, and it was good.
Raised on a Roux's version of Bud's sauce

Pretty much 2/3 ketchup 1/3 chili sauce and a tablespoon or 2 of liquid smoke

I've gone to equal parts ketchup and chili sauce before too

This is one I found many years ago. The guy implies that his uncle "Bud" invented it. It doesn't give exact measurements, though.

It's likely that the recipe linked above was based on this blog post, because I read this before Katrina, I'm sure.

Bud's Broiler's Hickory Sauce

"In New Orleans people like a type of Hickory Smoke Sauce on their Hamburgers. As a kid I discovered this sauce from an Uncle who claimed to have invented it and kept it secret so people would always ask him to make them some. As he got old and did not want to take the secret with him. He wasn't sure where he was going or if they would need a Secret Hickory Smoke Sauce there. He told me to keep it a secret too, so do not tell anyone what is below, Uncle Bud said he would haunt ya."

ketchup
tomato sauce
liquid smoke
chili powder
Citric acid aka "sour salt" or vinegar (vinegar tends to make it too thin)

The sauce must be cooked to develop the flavors, depending on how much you need just remember the basic is half tomato ketchup and half tomato sauce in a sauce pan. Simmer on med heat add in the secret stuff, Liquid Hickory Smoke and Chili Powder to taste, not too much enough so the taste of the Hickory comes through and the Chili calms down the tomatoes. After it cooks a while let it on simmer and keep it warm.

Source: stuffedartichoke.blogspot.com