5lbsrusset potatoes, peeled and cut into 1 inch cubes
1cupwhole milk, at room temperature
½cupsour cream, at room temperature
12tablespoonunsalted butter (1 ½ sticks), at room temperature
¼cuptruffle oil
¼cupfreshly grated Parmesan cheese
2teaspoonsea salt
⅛teaspoonblack pepper
1tablespoonchopped Italian parsley (optional)
Instructions
Place the potatoes into a large stockpot and cover with salted cold water. Bring the potatoes to a gentle boil and cook for 15-20 minutes or until tender. Drain the potatoes and add back to pot or large mixing bowl.
Add milk, sour cream, butter, truffle oil, cheese, salt and black pepper and mash potatoes. After slightly mashed, beat with an electric mixer on medium speed until smooth and fluffy.
Transfer the mashed potatoes to a serving dish. Top with some fresh herbs if desired.
Notes
Start the potatoes in cold water, add salt, bring to boil and then reduce to simmer. If you start in hot water, the potatoes will cook unevenly.
Drain the potatoes well to avoid a mushy, watery mess.
Use room temperature ingredients so they are absorbed more evenly by the potatoes.
Taste the potatoes as you add the truffle oil to make sure it is the right flavor for you.
Do not overwork the potatoes. You want to mash/whip until just light and fluffy.