6 med onions veg oil 1 can tomato puree (28 oz) 3 cans tomatoes, with juice (3 x 28oz) 2 c white vinegar 1/4 c liquid smoke 1 c Coke 1 c Gulden's "spicy" brown mustard 1/2 c dark brown sugar 2 T kosher salt 1 t black pepper 1 t sweet paprika 1 t chili powder