Bring a large stock pot of water to a boil. Salt and add the potatoes. Boil until fork tender, about 15 minutes. Drain.
In a small saucepan, add the butter and heat over medium heat. Stir constantly. The butter will begin to foam and sizzle, keep stirring. In about 5 minutes the butter will turn a gold brown and the milk solids will have fallen to the bottom. Remove from the heat and set aside.
Run the potatoes through a food mill or potato ricer into a large bowl. Add ⅔ of the browned butter, buttermilk, and Greek Freak. Stir to combine. Add more milk if the potatoes are not creamy enough.
Drizzle the top with the remaining browned butter and a sprinkle of Greek Freak. Serve immediately.