In addition, the cake in the oven should be observed outside the oven before it is baked. The mature Qifeng cake has a golden surface and a slightly convex top. Whether there are cracks or not is actually uncertain. If the appearance is in place, you can turn on the stove and insert it from the top of the cake with a slender tool, such as a slender stick or a slender fruit knife, and there is no paste on it after it is pulled out. It has matured.
According to the landlord's description, the oven temperature is too high and the cake is large, so the coking reaction on the surface of the cake during baking is faster than the heat transfer inside the cake. The result is that the cake should be mature on the surface, but once you use tools to explore the inside, the degree of maturity is not satisfactory.
Please ask the landlord to lower the furnace temperature and extend the baking time appropriately.