1. Put water+milk+butter+salt in a pot and boil it until the butter is completely dissolved, then remove from the heat. 2. Add soft flour, mix, put on low heat, and heat while stirring until a film forms on the bottom. 3. Transfer the dough to another bowl, cool it slightly, then add the egg and mix. 4. Pan in an oven pan and sprinkle with water. 5. Sprinkle plenty of pearl sugar and bake in an oven preheated to 190 degrees for 15 to 20 minutes.