This is what I use..it's awesome on pork and chicken
3/4 Cup Yellow Mustard
3/4 Cup Cider Vinegar
1 TBS Light brown Sugar
1 1/2 TBS unsalted butter
2 tsp salt
2 tsp Worcestershire sauce
1 1/4 tsp freshly ground black pepper
2 tsp Louisiana-style hot sauce, or more to taste
Combine all ingredients in saucepan, whisk to blend, and simmer over low heat for 20 minutes. Cool and put in a glass bottle for storage in the refer.