Barbecue Sauce - cooking recipe

Ingredients

1/4 c. vinegar
salt and pepper
1 Tbsp. soy sauce
1 Tbsp. sugar
1/2 c. ketchup
3 Tbsp. mustard
1/2 c. water
1 Tbsp. butter

Preparation

Combine all ingredients except ketchup and soy sauce.
Bring to a boil, reduce heat then add them.
Get mixture hot and remove from heat.