Method

• Bring a large pot of salted water to a boil
• Wash and scrub potatoes with a green scrub pad
• Cut into uniform chunks
• Boil until fork tender, then boil a few minutes longer
• Drain in a colander
• Transfer back to the pot and add salt, pepper, cayenne, butter
• Mash until potatoes are mostly smooth, but avoid overworking them
• Stir in sour cream
• Mix in green onions
• Taste and adjust seasoning