Barbecued Chicken Sandwich

• 7 dry rub
• 2 garlic (cloves minced)
• 350 ml cider vinegar
• 240 ml ketchup
• 240 gr coffee
• 28 gr brown sugar
• 16 ml mustard
• 16 ml peanut oil
• 12 gr onion (minced)
• 7 gr paprika hungarian