Pommes Purée

2 lbYukon Gold potatoes
20 tbspbutter (unsalted)
1⅓ cupswhole milk (+ a little extra)
2 tspsalt
1Peel and chop potatoes into 1" cubes. Rinse and set aside to drain.10 min
2Heat the butter, milk, and salt in a large saucepan over medium heat until the butter is melted.5 min
3Add the potatoes and increase the heat to a very low simmer. Cover, and allow the potatoes to cook until very soft all the way through.20 min
4Drain the potatoes while retaining the liquid.1 min
5Clean the saucepan to remove any scum from cooking.1 min
6Return the liquid to the saucepan over very low heat.1 min
7Using the purée blade in a food processor, process all the solid potato chunks.3 min
8Recombine the puréed potatoes with the warm liquid in the saucepan adding just enough milk to create make them almost pourable (like thick pudding) and bring back to temperature.5 min