Mustard BBQ sauce (perfect for..PORK)

I found Dad's sauce! its almost exactly like i was making mine, but this one is better.

 My Dad Jim is master of all sauces... this one is great on pulled pork, and i bet it would work amazing on smoked chicken.

Mustard BBQ Sauce

1.            3/4 cup cider vinegar
2.            1/4 c water
3.            2 tbls chili powder
4.            1 cup yellow mustard
5.            1/2 c sugar
6.            1/4 c brown sugar
7.            1/2 tsp soy sauce
8.            2 tbls butter
9.            1 tbl liquid smoke

Mix first six ingredients and simmer for 30 minutes. Stir in remaining ingredients and simmer for 10 more minutes.