5lbsrusset potatoes, peeled and cut into 1 inch cubes
4garlic cloves, peeled and smashed
1cupwhole milk, at room temperature
½cupsour cream, at room temperature
12tablespoonunsalted butter (1 ½ sticks)
2teaspoonsea salt
⅛teaspoonblack pepper
1tablespoonchopped Italian parsley (optional)
Instructions
Place the potatoes and garlic 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 garlic and add back to pot or large mixing bowl.
While the potatoes are boiling, cook the butter in a medium saucepan over medium heat, stirring often, until it foams and has a nutty aroma, about 5-7 minutes. Remove from heat.
Add milk, sour cream, ¾ of the brown butter, 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 remaining brown butter and 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.
If you don't have sour cream, Greek yogurt makes for a good substitute.
Do not overwork the potatoes. You want to mash/whip until just light and fluffy.