Rinse and clean potatoes before putting in a large pot. No need to peel them, the mash tastes better with them on! Add cold water to the pot, just covering the potatoes, and a dash of salt. Bring to a boil and cook for approx. 15 min. or until tender. Drain potatoes and while they are still hot, smash together with the sour cream, butter & cheddar cheese. Add salt and pepper to taste.