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 thoroughly combined.
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 cream, egg, and vanilla extract until smooth.
05 - Pour wet mixture over flour mixture. Stir gently with a spatula or wooden spoon until just combined. Do not overmix.
06 - Gently fold in chopped strawberries, taking care to distribute evenly without crushing the fruit or overworking the dough.
07 - Turn dough onto a lightly floured surface. Pat into a 1-inch-thick round disc. Cut into 8 equal wedges using a knife or bench scraper. Transfer wedges to prepared baking sheet, spacing 2 inches apart.
08 - Brush tops of scones with additional heavy cream. Sprinkle generously with coarse sugar if using.
09 - Bake for 16 to 18 minutes until golden brown on top and a toothpick inserted into the center comes out clean.
10 - Let scones cool on baking sheet for 5 minutes, then transfer to a wire rack. Serve warm with clotted cream or butter if desired.