The method of making mashed potatoes is as follows: Put the potatoes in cold water and cook them with the skin on. I cooked them for 30 minutes. They can be easily pierced with chopsticks.
Use a spoon to mash the potatoes into a fine mesh.
Pour the mashed potatoes into a non-stick pan, add enough cold butter (cut into small cubes) just taken out of the refrigerator, and heat over low heat.
Stir constantly with a spatula and heat over low heat until the butter is completely absorbed.
Pour in the boiled milk and continue stirring.
Grind in a little white pepper and mix well.
Finally add a little chopped chives and the delicious mashed potatoes are ready.