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 blended.
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 combined.
05 - Pour the wet mixture over the flour mixture. Stir gently with a spatula or wooden spoon until just combined. Do not overmix.
06 - Gently fold in fresh raspberries and white chocolate chips, being careful not to crush the berries.
07 - Turn the dough onto a lightly floured surface. Gently pat into a 1-inch thick circle, about 7 inches in diameter. Cut into 8 equal wedges and transfer to the prepared baking sheet, spacing them 2 inches apart.
08 - Brush the tops of the scones with a little extra cream. Bake for 16-18 minutes until golden brown on top and firm to the touch.
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, 1 tablespoon of milk or cream, and vanilla extract. Add additional liquid 1 teaspoon at a time until desired consistency is reached.
11 - Drizzle the glaze over warm or cooled scones. Allow glaze to set for 5 minutes before serving.