Mashed potatoes are one of my top comfort foods, and I love an ultra-smooth, creamy version laden with butter and cream or milk. They’re also a blank canvas when I feel like changing it up a bit, and one of the easiest additions is some sour cream. The thick, tangy dairy is a natural in mashed potatoes, adding a subtle tangy flavor. Sour cream mashed potatoes are as easy to make as regular mashed potatoes, and you can channel some sour cream-and-onion vibes with a sprinkle of chives or scallions at the end.