Fill a large pot about 1/3 full with water. Add 1 tsp. salt, cover with the lid, and bring to a boil on high.
Meanwhile, peel potatoes and cut into cubes, about 1" across.
Add potatoes to boiling water. Bring back up to a boil and then turn town to a hearty simmer. Put the lid back on the pot cocked at an angle to allow some steam to escape.
Boil until tender, about 20 minutes.
While the potatoes are cooking, add cream cheese, cream, butter, bullion, and pepper to a medium microwave safe bowl. Microwave this mixture for 2 minutes. Set by the stand mixer.
When the potatoes are tender, drain them and add to a stand mixer fitted with the whisk attachment. Pour the seasoning mixture over the potatoes.
Beat on high for 30-45 seconds. Do not overbeat or potatoes will become gluey.
Serve hot. Garnish with additional ground pepper and chunks of butter if desired.