Family Style Food

0 About 30 minutes before making the scones, put the butter in a bowl and place in the freezer. Preheat the oven to 400 (200C) degrees with the racks arranged in the center.
1 Line two rimmed baking sheets with parchment paper.
2 Combine the flour, baking powder, baking soda, salt and ⅓ cup of the sugar in a food processor work bowl or bowl of a standing mixer fitted with the paddle. Pulse the dry ingredients or mix on low until incorporated.
3 Add the butter and pulse a few times until the mixture is pale yellow and the texture of fine meal. If using a standing mixer, mix on low speed until the mixture looks right, which will take a few minutes.
4 Add the vanilla and buttermilk and pulse/mix just until a dough forms - don't overdo it or the dough will toughen.
5 Dump the mixture onto a lightly floured surface. Gently knead the dough together to form a ball, then pat it into a circle slightly thicker than 1/2-inch. Cut out circles as close together as possible and arrange 1-inch apart on the baking sheets. Gather the scraps, gently patting and pressing together and cut out the remaining dough.
6 Brush the tops of the scones with the egg white, then sprinkle lightly with the remaining teaspoon sugar.
7 Bake about 15 minutes, until the scones are lightly browned. Serve warm, split in half and spread with mascarpone cheese, jam, and some strawberries.