In fact, the temperature of different ovens varies greatly. In my opinion, 250 degrees seems a little high. I'm afraid the egg tart skin is burnt and the inside is not cooked yet. If it's the first time to cook, it's best to try 220 degrees, 10- 15 minutes, and then decide whether to bake the egg tart for a few more minutes according to the situation. . . And did you make your egg tart skin yourself or buy it ready-made? You need to bake it twice separately when you make it yourself. . .