Since "yaller sauce" is getting kind of hard to find around here, I figured out this recipe after several attempts. We like it better than the store-bought kind. Put this stuff in the blender for a few seconds then store in a glass jar in the refrigerator. Shake before using.
1/2 cup yellow mustard
1/2 cup cider vinegar
1/2 cup brown sugar
1 teaspoon paprika
1 teaspoon Worcestershire sauce
1/2 teaspoon white pepper
1/2 to 1 teaspoon red pepper powder
1/2 teaspoon black pepper