Why are steamed cakes so hard?

Some steamed cakes will collapse because less alkali is used when neutralizing with alkali, so steamed cakes will collapse. You can take a little less noodles (about the size of peanuts) and steam them on the steamer for a while, because steaming takes about three minutes. If this facet rises well, it means that the amount of alkali is just right. If it collapses, it means there is less alkali, so you can put more alkali in the noodles.