For the Spice Rub:

1¼ cup packed dark brown sugar

¾ cup kosher salt

¾ cup freshly ground coffee beans

2 tablespoons smoked paprika

1 tablespoon ground cumin

1 tablespoon cayenne pepper

For the Ribs:

6 pounds baby back pork ribs, spare pork ribs or beef ribs

One 12-ounce bottle hard cider

1¼ cups store-bought or homemade barbecue sauce, plus more for serving

2 tablespoons apple cider vinegar