For best results, use the coldest possible ingredients and handle dough gently. Frozen blueberries can be used—just add them straight from the freezer. Scones are best served fresh but can be stored in an airtight container for up to 2 days at room temp, or wrapped and refrigerated for up to 5 days. To freeze: freeze shaped, unbaked wedges and bake from frozen, adding 2–3 minutes to bake time. Glaze is optional, but adds a classic sweet finish. Try lemon glaze (lemon juice instead of milk) for extra zing.