To Freeze: After baking the cake layers, allow them to cool completely, then wrap them well in plastic wrap and stick each layer in a ziplock freezer bag. Freeze for up to three months. Frost the cakes when they are frozen–they are much easier to frost this way! The assembled German Chocolate Cake can also be frozen, covered well, for 2-3 months (I recommend slicing the cake and wrapping each slice really well in plastic wrap, then placing in a freezer-safe container, for best results). Allow to come to room temperature before serving.