Perfect Mashed Potatoes

• Wash, peel and rinse potatoes. 
• Boil in salted water for 20 minutes. 
• Drain well.
• Cover with lid, and leave potatoes to dry off inside their pan for a few minutes over a low heat.
• Move potatoes into a clean pan.
• Put potatoes through a ricer, sieve, or potato masher.
• Add 1oz of butter for every 1lb of potatoes in pan.
• Stir in well with a wooden spoon.
• Gradually add about 2 tablespoons of cold milk and stir in well.
• Check and adjust seasoning.
• Place in a serving dish in a dome shape.
• Use a fork to score the surface.