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. Use a pastry cutter or your fingertips to work the butter into the flour 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 incorporated.
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 circle. Cut into 8 equal wedges and transfer to the prepared baking sheet, leaving space between each scone.
08 - Brush the tops of the scones with a little extra heavy cream. Bake for 16-18 minutes until golden brown on top. Let cool slightly on a wire rack.
09 - While scones cool, whisk together powdered sugar, 1 tablespoon of milk or cream, and vanilla extract until smooth. Add additional milk or cream 1 teaspoon at a time if needed to reach desired consistency.
10 - Drizzle the glaze over warm or completely cooled scones. Serve fresh or store in an airtight container for up to 2 days.