Sweet 'n' Spicy BBQ Sauce

Ingredients:

• 2 C packed brown sugar
• 2 C ketchup
• 1 C water
• 1 C cider vinegar
• 1 C finely chopped onion
• 1 (8 oz) can tomato sauce
• 1 C corn syrup
• 1 C molasses
• 1 (6 ounce) can tomato paste
• 2 T Worcestershire sauce
• 1 T garlic pepper blend
• 1 T liquid smoke flavoring (optional)
• 1 T prepared mustard
• 1 t onion salt
• 1 t celery salt