Dr. Pop BBQ Sauce

Name: Dr. Pop BBQ Sauce
Prep time: 15 h
Cook time: 1 h 5 min
Total time: 1 h 5 min
Yield: 15 portion
Ingredients: 115 g onions; 2 garlic cloves; 30 g butter, unsalted; 650 g soda; 60 g dark brown sugar; 45 g molasses, any kind; 340 g tomato purée (concentrate); 60 g cider vinegar; 30 g Worcestershire sauce; 30 g mustard; ½ tsp cumin, ground; 1 ½ tsp salt; 1 tbsp ancho chilli powder; 60 g honey