1. Heat the milk in a saucepan over medium heat until it starts to simmer. Do not boil.

2. Meanwhile, boil water separately in a kettle or a saucepan.

3. Add instant coffee powder and sugar to a cup.

4. Pour a little hot water (around 1-2 tbsp) into the cup and stir well until the coffee and sugar dissolve completely.

5. Pour the hot milk into the cup and mix well.

6. If desired, you can froth the milk using a milk frother or by pouring the mixture back and forth between two cups until it becomes frothy.

7. Sprinkle some cocoa powder or cinnamon powder on top (optional).

8. Serve hot.