Brining poultry is always a surefire way to infuse the meat with incredible flavors. It also tenderizes the meat and adds more moisture! It’s an optional step but a great method to use if you want to take this recipe over the top. To brine Cornish game hens, make a brine solution by dissolving salt and sugar in a large pot of water. Soak the hens in the brine for 2 to 4 hours before cooking.