Place potatoes in a large pot. Add plenty of clean water and bring to a boil. Add some salt and keep boiling for about 20 minutes or until potatoes are cooked through.
While the potatoes are cooking, it's time to brown the butter. In a small saucepan (preferably white or silver colored so you can watch the butter brown), melt the butter on medium-low heat. Keep cooking the butter until tiny brown pieces start to form on the bottom of the pan. Remove the butter from the heat immediately.
Warm up the milk on the stove top or in the microwave.
Drain the potatoes and pour the milk and the butter on top. Using the potato masher, work on the mixture until it looks smooth and no lumps remain.