For a citrus note, add the finely grated zest of 1 orange directly on top of the cranberry cylinder before you sprinkle on the cake mix. If you prefer a slightly less sweet dessert, you can use a white cake mix instead of yellow, which lets the cranberry’s tartness stand out a bit more. A spiced version is lovely in cooler weather: whisk 1 teaspoon ground cinnamon and 1/4 teaspoon ground nutmeg into the dry cake mix before sprinkling it over the cranberry. For a crunch, scatter 1/3 cup chopped pecans or walnuts over the cake mix before drizzling on the butter. If you only have salted butter, you can use it and simply skip any additional salt. Food safety tips: Always start with a clean, dry slow cooker insert to reduce the risk of bacterial growth. Keep the lid on during cooking so the dessert reaches and maintains a safe temperature; lifting the lid frequently can extend cooking time and keep the center from heating properly. Refrigerate leftovers within 2 hours of cooking in a shallow container so they cool quickly, and reheat portions until steaming hot before serving again. Because this dessert is quite moist, enjoy refrigerated leftovers within 3–4 days.