Prepare the Pork: Remove the 5-10 pound pork shoulder from its packaging and pat it dry. Record the weight of the roast, as you'll use this to determine the curing time and the amount of Prague Powder #1 needed.
Toast the Spices: Place 1 tablespoon allspice berries and 1 teaspoon whole coriander in a dry skillet over medium heat. Toast for about 60 seconds, or until fragrant. Lightly crush them with a mortar and pestle or the bottom of a heavy pan.
Make the Brine: In a large pot, heat 1 quart of the water. Add 1 cup salt, ¾ cup dark brown sugar, and ¼ cup molasses, stirring until completely dissolved. Add the toasted allspice and coriander along with 3 bay leaves, 1 tablespoon black peppercorns, 5 garlic cloves, ½ cup shallots, ½ teaspoon dried thyme, 1 teaspoon Worcestershire, and 1 tablespoon ginger paste. Remove from the heat and allow the mixture to steep for 5 to 10 minutes, like a savory tea.
Chill the Brine: Add the remaining cold water and ice, if needed, to quickly cool the brine. The brine must be completely cold before it comes into contact with the pork.
Add the Curing Salt: Once the brine has cooled, stir in the Prague Powder #1 Premium Pink Curing Salt until fully dissolved. Adding it after cooling helps ensure accurate measurements and prevents unnecessary heat exposure.
Cure the Ham: Place the pork shoulder into a large food-safe container and pour the brine over the top. The meat should be completely submerged. If needed, place a plate or food-safe weight on top to keep it beneath the surface. Cover and refrigerate.
Allow Time for the Cure to Work: A common recommendation is to cure pork for approximately 1 day per 2 pounds of meat. For the ham pictured here, I chose to cure it for 1 day per pound.
Every 2 to 3 days, flip the ham over in the brine. This helps ensure all sides receive equal exposure to the curing liquid and promotes a more even cure.
Rinse and Cook: Once the curing period is complete, remove the ham from the brine and rinse it under cold water. Pat dry and proceed with your preferred cooking method.