2. Sprinkle cocoa powder while it is hot. Note that the action should be fast, the coffee will solidify and agglomerate when it is cold, and even sink to the bottom of the cup;
3. Pour the milk into a small bottle and shake it up and down to shake out the uniform milk bubbles;
4. Turn the handle of the coffee cup in the opposite direction, tilt the cup slightly forward, and then gently inject a small amount of milk bubbles into the deepest part of the coffee;
5. Finally, pull out the flowers with a toothpick. You must draw carefully to pull out the most beautiful flowers.