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 cold butter cubes to the dry mixture. Cut in with a pastry cutter or fingertips until mixture resembles coarse crumbs with pea-sized butter pieces remaining.
04 - In a separate bowl, whisk together heavy cream, egg, and vanilla extract until fully incorporated.
05 - Pour wet ingredients into dry ingredients. Stir gently with a spatula or wooden spoon until just combined. Do not overmix; some flour streaks should remain visible.
06 - Add raspberries and white chocolate chips. Gently fold to distribute evenly throughout the dough. Some raspberry breakage is expected and adds color to the scones.
07 - Turn dough out onto a lightly floured surface. Gently pat into an 8-inch circle, approximately 1 inch thick. Handle dough minimally to maintain tender texture.
08 - Cut the circle into 8 equal wedges using a sharp knife or bench scraper. Transfer wedges to the prepared baking sheet, leaving space between each scone.
09 - Brush tops of scones with a thin layer of heavy cream. Bake for 16-18 minutes until golden brown on top and edges. Cool on baking sheet for 5 minutes before transferring to wire rack.
10 - While scones cool, whisk powdered sugar, milk or cream, and vanilla extract in a small bowl until smooth and drizzling consistency is reached. Adjust liquid as needed.
11 - Drizzle glaze generously over cooled scones. Allow glaze to set for 5-10 minutes before serving. Best enjoyed warm or at room temperature on the same day.