You can freeze the raw patties individually and then store them airtight in the freezer. This is done easily on a sheet pan in the freezer. Once frozen, transfer to an airtight container. You can also store in the fridge or freeze using aluminum foil or parchment paper cut into patty-size squares to separate the burgers and then stack, seal and freeze them. They will last for up to 4 months in the freezer. You need to defrost them in the fridge for 24 hours before cooking. Check out more Freezer Tips for Easy Dinners!