01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, and salt until thoroughly blended.
03 - Add cold butter and cut into the flour mixture using a pastry blender or fingertips until the mixture resembles coarse crumbs with some pea-sized pieces remaining.
04 - In a separate bowl, whisk together cream, egg, and vanilla extract until fully combined.
05 - Pour the wet mixture over the flour mixture. Stir gently with a spatula until just combined; do not overmix as this will result in tough scones.
06 - Gently fold in raspberries and white chocolate, being careful not to crush the berries.
07 - Turn dough out onto a lightly floured surface. Shape into a 7-inch round, about 1-inch thick.
08 - Cut into 8 wedges and place on the prepared baking sheet, spacing them 2 inches apart for even baking.
09 - Brush tops with a little extra cream and sprinkle with coarse sugar, if using, for a golden, crunchy top.
10 - Bake for 16 to 18 minutes or until golden brown and cooked through. Cool on the baking sheet for 5 minutes before transferring to a wire rack.