Sticky toffee pudding is good in the freezer for up to 3 months. To freeze the cakes, first allow them to cool completely after they have been baked. Then, wrap each cake tightly in plastic wrap and place it in an airtight container or freezer bag. When you are ready to serve the frozen sticky toffee pudding, thaw it in the refrigerator or at room temperature until it reaches the desired temperature. You can then rewarm it in the microwave, if you prefer.