01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl.
03 - Add cold butter cubes. Cut in with pastry cutter or fingertips until mixture resembles coarse crumbs.
04 - Whisk together cream, egg, and vanilla extract in a separate bowl.
05 - Pour wet ingredients into dry ingredients. Stir gently until just combined—do not overmix.
06 - Add raspberries and white chocolate. Gently fold to distribute evenly. Raspberries may break up slightly.
07 - Turn dough onto lightly floured surface. Pat into an 8-inch circle about 1 inch thick.
08 - Cut into 8 wedges and transfer to prepared baking sheet.
09 - Brush tops with extra cream. Bake 16-18 minutes until golden brown. Cool on wire rack.
10 - Whisk powdered sugar, milk, and vanilla until smooth. Drizzle over cooled scones.