adapted by There's Always Thyme to Cook
Source: from San, original recipe posted by Ruthanna on Gardenweb
2/3 cup yellow prepared mustard
1/2 cup white sugar
1/4 cup brown sugar
1 cup cider vinegar
2 tablespoons chili powder (medium heat)
2 teaspoons black pepper
5 to 6 drops Tabasco sauce
1/2 teaspoon soy sauce
1 tablespoon butter
Combine all ingredients except the soy sauce and butter in saucepan. Be careful as the sauce will smell very pungent. Simmer for about 15 to 20 minutes. Remove from heat. Stir in soy sauce and butter.
Use as a basting sauce for barbequed meat or as a condiment alongside grilled pork, beef or chicken. Also good on pulled pork sandwiches.