01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, whisk together the flour, sugar, baking powder, and salt until well blended.
03 - Add the cold, cubed butter to the flour mixture. Using a pastry cutter or your fingertips, 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 the heavy cream, egg, and vanilla extract until fully combined.
05 - Pour the wet ingredients into the dry mixture. Stir gently with a spatula or wooden spoon until just combined. The dough should be slightly shaggy but hold together. Do not overmix.
06 - Fold in the chocolate chips until evenly distributed throughout the dough.
07 - Turn the dough out onto a lightly floured surface. Gently pat into a 7-inch circle about 1 inch thick. Handle the dough minimally to prevent toughening.
08 - Cut the circle into 8 equal wedges using a sharp knife or bench scraper. Transfer wedges to the prepared baking sheet, spacing them about 2 inches apart.
09 - Lightly brush the tops of each scone with a small amount of heavy cream for a golden, glossy finish.
10 - Bake for 16 to 18 minutes, or until scones are golden brown on top and a toothpick inserted into the center comes out clean.
11 - Transfer scones to a wire rack and let cool for at least 10 minutes before serving. Serve warm or at room temperature.