1, the cake is not completely cooked: during the heating process, if the cake is not fully heated, it will be completely baked, and it may shrink after being cooked. Need to remind everyone that cakes also have their own "temperament". When heating, you must master the heat, and then stop heating when it is cooked.

2. There is no back-up immediately after baking: If there is no back-up immediately after baking, the temperature on the surface and inside of the cake drops suddenly, and there may be retraction. Therefore, don't wait too long before taking it out. You should buckle it immediately and eat it after cooling slightly.

3. Too long heating time causes the cake to be too dry: When heating the cake, the time should not be adjusted too long, because if the cake is heated for too long, the water will be lost, and if it is too dry, it will lead to retraction.

4. The batter was not stirred evenly: it was not stirred evenly before being poured into the rice cooker. Generally, the cake that is heavier will sink to the bottom, and the cake with smaller proportion will rise, so that it will be easy to retract.

5. Open the lid during the heating process: During the heating process, it is best not to open the lid under the condition of being immature, otherwise, the cake will retract.