Let's talk about the problem of collapsing first. Generally, there are two possibilities for collapsing. First, it is premature to demould, and it is urgent to demould before it is completely cooled. At this time, the internal structure of the cake has not been fully finalized, which will easily lead to collapsing. Second, excessive mixing of the batter will lead to ribs, which will also collapse, and the ribs will also cause shrinkage, so if your cake collapses and is accompanied by shrinkage, it is likely to be ribs.
Let's talk about retraction There are many reasons for retraction, one of which is that the batter is excessively stirred. The other is that the mold is not completely cleaned and the adhesion is not strong, so it is easy to retract (but if you talk about sticking the mold later, that should not be the reason). The third is that the egg yolk paste is not fully stirred until it is completely emulsified, and the fourth is that the protein is not sent in place. Although many people say that wet foaming or wet foaming is almost dry, it can also be used as a hurricane, and the taste is softer, but novices still try to dry foaming, which is less likely to fail. Of course, be careful not to overdo it. The fifth reason is the defoaming of protein, which may be caused by incorrect techniques in the mixing process of protein and yolk paste, or it may be caused by the failure to bake the batter in time after mixing. The sixth is that it is not completely cooked. If your cake has a wet pudding layer after cutting, that's the reason. The seventh is to adjust the temperature or open and close the oven door many times during baking, which may also cause retraction. The eighth is that it was not reversed in time after it was released from the furnace. Nine is that the baking time is too long or the temperature is too high, so the cake may shrink after it is baked.
Look for the reason by yourself.
Let's talk about the third problem of sticking the mold. You don't have to worry about this. This is normal. Qi Feng just can't use the anti-sticking mold because he has to climb the mold. If he uses the anti-sticking mold, he can't climb high.