If your caramel has become too solid after being left in the freezer for too long, you can use a few different methods to cut it. Here are some options:
Let it sit at room temperature: Take the container of caramel out of the freezer and let it sit at room temperature for some time. The caramel should gradually soften, making it easier to cut. The exact time needed will depend on the size of the caramel block and the room temperature, but it may take anywhere from 15 minutes to an hour or more.
Use a warm knife: Dip a sharp knife in hot water, then dry it with a towel. The warm knife will help to melt through the frozen caramel more easily. Slice the caramel with the warmed knife, and repeat the process as needed.
Use a cheese wire or dental floss: If the caramel is in a rectangular or square shape, you can try using a cheese wire or dental floss to cut through it. Hold the wire or floss taut and slide it down through the caramel block, using a sawing motion.
Use a heavy-duty knife or cleaver: If the caramel is extremely solid, you might need to use a heavy-duty knife or cleaver to apply more force when cutting through it. Be cautious while using this method, and ensure the knife is stable and secure.
Remember, cutting frozen caramel can be challenging, so patience and care are essential to avoid any accidents. Once you've cut the desired portion, store the remaining caramel in the refrigerator or at room temperature if it has softened enough.