The reason is that your tortillas are very thick and big. Usually, when we make a pot helmet, we will poke holes in it evenly with thinner chopsticks, so that steam can enter deeper and ensure the degree of immaturity. So is the cake.

Now the steaming time is 25 minutes, which is the shape of steamed bread. As steamed bread gets bigger, the whole time is relatively longer, just like steamed vegetable buns, the time for steaming meat buns is definitely different. Steamed steamed buns are sure to lose when cooked, but meat buns are different. The same reason!