Step 1

Put the potatoes in a large pot and cover with cold water. Generously salt the water and bring to a boil over high heat. Then lower the heat to medium and gently simmer until the potatoes are completely tender when pierced with the tip of a knife, about 30 minutes.

Step 2

Drain the potatoes well and return them to the pot. Place the pot over low heat and let any residual water steam off, about 2 minutes. Mash the potatoes well with a potato masher. Fold in the butter with a spatula until melted, and then fold in the cream. Season with salt and pepper.