5tablespoonsunsalted butter,chilled and cut into small pieces
1 to 1½ cupsmix of blueberries and halved raspberries
sugar or chunky sugar crystals,optional
Preheat the oven to 400°F. Line a baking sheet with parchment or a silicone mat.
In a small bowl, stir the cream and egg together.
In a large bowl, whisk together the flour, sugar, baking powder and salt. Drop in the butter and, using your fingers or a pastry cutter, cut and rub the butter into the dry ingredients until the mixture is crumbly.
Pour the cream/egg mixture over the dry ingredients and stir gently with a fork just until the dough, which will be wet and sticky, comes together. Don't over-work it. Sprinkle in the berries, and -still in the bowl- gently knead them into the dough.
Lightly dust a work surface with flour and turn out the dough. Pat the dough into a rough circle that's about 10 inches in diameter, use a cutter to cut rounds and place them on the baking sheet (alternately, you can divide the dough in half, pat-out two rounds and cut wedges instead). Sprinkle with sugar, if desired.
Bake the scones for 15 to 20 minutes, or until their tops are golden and firm. Transfer them to a rack and cool for 10 minutes before serving, or wait for them to cool to room temperature. They are very good served warm with a generous smudge of butter.