1. Prepare ingredients, including eggplant and brown sugar.

2. Take a small pot, add appropriate amount of water and eggplant skin, bring to a boil with high fire, then turn to low heat and continue to cook for about 20 minutes.

3. After the eggplant skin is boiled soft, add appropriate amount of brown sugar, stir well, and continue to cook for 2~3 minutes.

4. Pour the boiled eggplant skin brown sugar water into the cup, and drink it after cooling slightly.

Under normal circumstances, it takes about 25 minutes to boil the brown sugar water of eggplant skin. Of course, due to different practices and different thickness of eggplant skin, the specific cooking time may be different. If you want a more accurate time, it is recommended to check the specific recipes or adjust the cooking time according to your own tastes and preferences.