01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt until well combined.
03 - Add cubed cold butter to the flour mixture. Using a pastry cutter or your fingertips, cut in the butter until the mixture resembles coarse crumbs with some pea-sized pieces remaining.
04 - In a separate bowl, whisk together heavy cream, egg, and vanilla extract until fully blended.
05 - Pour the wet mixture over the flour mixture. Stir gently with a spatula or wooden spoon just until the dough begins to come together. Do not overmix.
06 - Gently fold in raspberries and white chocolate chips, taking care not to crush the berries.
07 - Turn the dough onto a lightly floured surface. Pat into a 1-inch thick disc. Cut into 8 equal wedges and transfer to the prepared baking sheet, spacing them 2 inches apart.
08 - Brush the tops of each scone with a thin layer of heavy cream. Bake for 16-18 minutes until golden brown on top and a toothpick inserted in the center comes out clean.
09 - Let scones cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
10 - While scones cool, whisk together powdered sugar, milk or cream, and vanilla extract until smooth. Add more liquid if needed to reach desired consistency.
11 - Drizzle the glaze over cooled or slightly warm scones. Serve immediately or store in an airtight container for up to 2 days.