These buttery scones won't keep well once baked. If you need to make these sweet scones ahead of time, you can make the dough and freeze unbaked scone on trays before transferring to a ziploc bag. When you're ready to bake, preheat oven, place the scones on a tray, and brush with heavy cream and sprinkle with sugar. Bake time will increase by several minutes - likely to roughly 25 minutes. Scones are done when they are golden brown and cooked through.