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 cold butter cubes to the dry mixture. Cut in using a pastry cutter or fingertips until mixture resembles coarse crumbs with some pea-sized butter pieces remaining.
04 - In a separate bowl, whisk together heavy cream, egg, and vanilla extract until combined.
05 - Pour wet ingredients into dry ingredients. Stir gently with a spatula or wooden spoon until just combined. Do not overmix.
06 - Add fresh raspberries and white chocolate chips. Gently fold to distribute evenly throughout the dough. Some raspberries may break apart slightly.
07 - Turn dough out onto a lightly floured surface. Pat gently into an 8-inch circle about 1 inch thick.
08 - Cut circle into 8 equal wedges using a sharp knife or bench scraper. Transfer wedges to prepared baking sheet, spacing them 2 inches apart.
09 - Brush tops of scones with a little extra heavy cream. Bake for 16-18 minutes until golden brown on top and edges.
10 - Let scones cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely before glazing.
11 - Whisk powdered sugar, 2 tablespoons milk or cream, and vanilla extract in a small bowl until smooth. Add additional milk 1 teaspoon at a time if needed to reach desired consistency.
12 - Drizzle glaze over cooled scones. Allow glaze to set for 10-15 minutes before serving.