Do not open the oven door before the cake is set.

Immediately remove from the baking pan after taking it out of the oven, turn it over to cool, so that the cake is shaken a lot to reduce shrinkage in the future.

If dents appear during the baking process, the reasons may be as follows:

The formula is unbalanced, the flour ratio is small, the water is too little, and the total water volume is insufficient.

The egg whites are not whipped enough. If the egg whites are not whipped enough, they will be too wet. The defoamed egg liquid will easily precipitate and turn into a pudding layer during the baking process, causing the surface of the cake to shrink and collapse. Go down.