Best-ever Bbq Ribs

• 800 gr pork baby back ribs (cut into)
• 220 gr packed brown sugar (light)
• 240 ml tomato catsup
• 80 ml wine vinegar (red)
• 16 ml worcestershire sauce
• 12 gr onion (minced)
• 3 gr salt
• 2 gr celery seed
• 1 gr coarse black pepper (ground)
• 1 gr cayenne pepper