Spiced chicken wings

Ingredients

• 2 kg chicken wings
• 3 tbsp sunflower oil
• white barbecue sauce
• 1 tbsp paprika powder
• 1 tbsp garlic powder
• ½ tbsp onion powder
• ½ tsp cayenne pepper
• ½ tsp ground cumin seed
• 1 tbsp salt
• 1 tbsp dark brown sugar
• ½ tbsp dried thyme
• 1 tsp chilli flakes
• ½ tbsp finely grated lime zest
• 100 ml ketchup
• 50 ml espresso
• 1 tbsp red-wine vinegar
• 1 tbsp lime juice
• 2 tbsp dark brown sugar
• 1 tbsp onion powder
• ¼ tsp salt