Wash and peel the potatoes, then cut them into 1-inch cubes for quicker cooking.

Place the potato cubes in a large pot and cover with cold water by about an inch; add a generous pinch of salt to the water.

Bring the water to a boil, then reduce heat and simmer until potatoes are very tender, about 15-20 minutes.

Drain the potatoes thoroughly in a colander, making sure to remove as much water as possible.

Return the drained potatoes to the hot pot over low heat for a minute to dry them further.

Add butter and milk to the pot, then mash the potatoes with a potato masher until smooth.

Season with salt and pepper to taste, then stir until well combined and serve hot.