Raspberries: Fresh raspberries work best. You can use frozen raspberries but keep in mind that they will make the dough wetter and a bit more difficult to work with and the rise may not be as good. If using frozen berries, don't thaw them. Use them directly from frozen. Toss them in flour to coat well and work quickly. Freeze the scones while you preheat the oven and add a few minutes of baking time as the frozen berries will lower the temperature of the batter.