01 - Preheat your oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until well combined.
03 - Add the cold, cubed butter to the dry 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 blended.
05 - Pour the wet ingredients into the dry mixture. Stir gently with a fork or spatula until just combined. Do not overmix—the dough should still appear slightly shaggy.
06 - Add the chocolate chips to the dough and fold them in gently with a spatula until evenly distributed.
07 - Turn the dough onto a lightly floured surface. Gently knead 2-3 times just until it holds together. Pat into a 7-inch circle about 1-inch thick.
08 - Cut the circle into 8 equal wedges using a sharp knife or bench scraper. Arrange the wedges on the prepared baking sheet, leaving about 2 inches of space between each scone.
09 - Lightly brush the tops of each scone with a small amount of heavy cream to promote even browning and a shiny finish.
10 - Bake for 16-18 minutes, or until the tops are golden brown and a toothpick inserted into the center comes out clean. Transfer to a wire rack to cool for at least 5 minutes before serving.