Yes, you can freeze patacones for longer-term storage. Allow them to cool completely, then place them in a single layer on a baking sheet and freeze until solid. Once frozen, transfer them to a freezer-safe bag or container and store in the freezer for up to 2 months. To reheat, bake them from frozen in a preheated oven at 350°F (175°C) for about 15-20 minutes, or until heated through and crispy.