Rinse potatoes. Cover with cold salted water in a medium saucepan. Bring to a boil over medium high heat and cook until tender.
While the potatoes cook, heat the milk (or cream) and butter in a small saucepan over low heat.
Drain potatoes and smash with a fork or potato masher.
Add to the potatoes the heated milk with butter, Stonewall Kitchen Roasted Garlic Oil, and salt and pepper to taste. Mash to desired consistency. Serve hot.