Add potato chunks to a pot and fill with water until just 1 inch above potatoes.
Boil potatoes over high heat until fork tender, about 20 minutes. Remove from heat, drain into a colander and cool for about 5 minutes.
Using a potato ricer (or a cheese grater), rice the potatoes back into the pot.
Add butter, salt and pepper.
Stir until all the butter has melted and potatoes are smooth and creamy. Add more salt and pepper as needed. Serve with more butter or gravy.
