Creamy mashed potatoes smothered in rich gravy are the quintessential family holiday side dish. This comforting, vegetarian-adaptable classic is the perfect companion to any roast.
Peel and cut the russet potatoes into even chunks for uniform cooking.
Place potatoes in a large pot, cover with cold water, and add 1 tsp of salt. Bring to a boil, then simmer over medium heat until fork-tender, about 20 minutes.
Drain potatoes thoroughly and return to the pot. Shake the pot gently over low heat to evaporate excess moisture.
Add butter to the hot potatoes and begin mashing, then incorporate the milk gradually while mashing until creamy and smooth.
Season with salt and black pepper to taste. Warm the gravy separately, then serve the mashed potatoes topped with hot gravy.