01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together flour, sugar, baking powder, and salt until well blended.
03 - Add cold butter cubes. Use a pastry cutter or your fingers to rub butter into flour until mixture resembles coarse crumbs with some pea-sized pieces remaining.
04 - In a small bowl, whisk together heavy cream, egg, and vanilla extract until combined.
05 - Pour wet mixture over flour mixture. Stir gently with a spatula or wooden spoon just until ingredients begin to come together.
06 - Gently fold chopped strawberries into dough. Mix briefly to distribute evenly without crushing fruit or overworking dough.
07 - Turn dough onto lightly floured surface. Pat gently into a 1-inch-thick round. Cut into 8 wedges using a knife or bench scraper. Transfer wedges to prepared baking sheet, spacing 2 inches apart.
08 - Brush tops of scones lightly with additional heavy cream. Sprinkle with coarse sugar if desired.
09 - Bake for 16-18 minutes until tops are golden brown and a toothpick inserted in center comes out clean. Cool on baking sheet for 5 minutes before transferring to wire rack.