These could not be any easier and they are good warm, cold, or room temperature. Wash, halve, and pit a bunch of peaches. Lay face-up in a baking dish, place a small pat of butter (I used about an eighth of a tablespoon on each of these small peaches) in the center of each one, and sprinkle generously with brown sugar.
Bake at 350 for 10 minutes and broil on high for another 3-4, until the top has caramelized. Serve with vanilla ice cream or enjoy just as they are.