In a large non-reactive pot, bring half the water, sugar, salt, and molasses to a boil. Stir to dissolve the sugar.Pour into a large container with the remaining water, and the apple cider.Place in the refrigerator and cool to 40 degrees F.
Press the black pepper into the pork belly.
Once the brine has cooled place the peppered pork belly into the mixture until completely submerged.Refrigerate for three days.
After three days have passed, remove the pork from the brine, rinse off, and pat dry with paper towels.