Put the potatoes in a large pot and cover with water. Bring to boil, turn to heat to medium-low and cook potatoes for 20 minutes or until you can easily pierce with a fork. Make sure when you cook the potatoes, that the water is a very low boil (a bubble burp every couple of seconds) – a big, rolling boil will make your potatoes mushy. Drain water.
Mash the potatoes. Mash and stir in the remaining ingredients to the mashed potatoes until smooth. Taste and adjust seasonings if needed.