1 kg (5-6 medium sized potatoes) of quality and washed potatoes
Remove the skin
Keep the skin to make crisps
Cut the potatoes
Cover with cold water
Salt
Cook covered for 20-30 min
After cooking, the baked potato should give way under your fingers but should still be slightly firm
Remove the water
Pass the potatoes through a sieve or mash directly in the pan
Mix vigorously this way
or that way faster (in order to obtain a white puree and slightly elastic)
add 1 pinch of salt
and gradually add 75 g (¼ cup + 1 tbsp) of butter cut into pieces
Gradually add 125 ml (1/2 cup) of boiled milk
We obtain a fine and soft puree (A good mash is a light, almost foamy mash)
Then heat the mash if necessary but do not boil it! It would destroy the flavor of the butter