Leave potatoes unpeeled and place in a large pot with 1 tablespoon of salt and enough cold water to cover potatoes completely.
Bring water to a boil.
Reduce heat and cover partially. Simmer for about 35 minutes or until a fork poked into potatoes goes through easily.
Drain and let potatoes cool enough to handle. The skins will now "rub" right off. Throw out skins and cut potatoes into large pieces.
In a small saucepan, combine the heavy cream, milk and butter over low heat until butter has melted. Stir and set aside.
Now I prefer to use a potato ricer to "rice" my potatoes into a light and fluffy deliciousness. Otherwise you can use whatever tool you would normally use to mash your potatoes.
Once mashed, it is easiest to use an immersion blender to combine the riced potatoes and cream cheese until incorporated.
Add the milk/butter mixture that you warmed earlier and blend by hand until combined.
Add salt and pepper to taste.
Check for consistency at this point. If your potatoes are not creamy enough, add additional cream or milk in small increments until you reach the desired consistency.