Paris Mash (Kentang Tumbuk Kaya & Krim)

Bahan-bahan (6 porsi)

• 1 kg / 2 lb Dutch Cream, Desiree, Yukon Gold or Maris Piper potatoes (Note 1)
• 150 - 200 g / 5 - 7 oz cold unsalted butter (, cut into 1.5cm / 1/2" cubes (Note 2))
• 1/2 - 3/4 cup (125 - 185ml) milk (, warmed (Note 3))
• Salt
• Softened butter
• Finely chopped parsley