4 tsp hot pepper flakes
1 tsp freshly ground black pepper
录 cup packed brown sugar
1 disposable aluminium foil shallow pan
2 tbsp kosher salt
2戮 tsp fine sea salt
2 tbsp granulated sugar
475ml/17fl oz cider vinegar
1 x 2.2-2.7kg/5-6lb pork shoulder, preferably with bone in and skin on (ask for a 鈥淏oston butt鈥)