Preheat the oven to 400℉. Line a rimmed cookie sheet with parchment paper. Set aside.
In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, and salt until combined.
2 cups all-purpose flour, 1/2 cup granulated sugar, 2½ teaspoons baking powder, ½ teaspoon salt
Use a box grater to grate the frozen butter. Immediately add the grated butter into the bowl of dry ingredients. Then, use a pastry cutter (or a fork and clean hands work) to cut the batter into the flour mixture until they are pea-sized crumbs.
1/2 cup (1 stick) frozen butter
In a medium mixing bowl, whisk together the heavy cream, whisked large egg, and vanilla extract until combined. Drizzle the wet ingredients into the larger bowl with the dry ingredients + butter.
1/2 cup heavy cream, 1 large egg, 2 teaspoons pure vanilla extract
Add the mini chocolate chips into the bowl.
1¼ cups miniature semi-sweet chocolate chips
Stir everything together, very gently, using a rubber spatula. Stir the dough until the mixture becomes somewhat moist and just comes together. Don't overmix or overwork the scone dough.
Cover your hands with flour, then work the dough a few times inside the bowl with your hands, to bring it together into a ball. Again, don't overwork the dough!
Transfer the ball of dough to a floured surface on the clean countertop. Form it into an 8-inch round flat disc. Divide the disc into 8 equal wedges using a sharp knife (cut it like you would a pizza). Place the scones onto the prepared baking sheet.
Use a pastry brush to brush the 2 tablespoons of heavy cream over top the scones. Then sprinkle the tops with coarse sanding sugar if using (you can also sprinkle them with granulated sugar if wanted, or leave the sugar off).
2 tablespoons heavy cream, 2 tablespoons coarse sanding sugar
Bake the scones for 18-25 minutes or until they start turning light golden brown.
Remove the pan from the oven and allow them to cool for 5 minutes, before serving them warm & fresh. Enjoy!