Mix the Dry Ingredients. In a large mixing bowl, whisk together the flour, sugar, baking powder, and salt.
Cut in the Butter. Add the cold, cubed butter to the dry ingredients. Using a pastry cutter or your fingertips, work the butter into the flour until the mixture resembles coarse crumbs.
Add the Wet Ingredients. In a separate bowl, whisk together the heavy cream, egg, and vanilla extract. Pour the wet ingredients into the dry ingredients and gently mix until the dough just comes together.
Fold in the Chocolate Chips. Gently fold in the chocolate chips, being careful not to overwork the dough.
Shape and Cut the Dough. Turn the dough onto a lightly floured surface and pat it into a 1-inch thick circle. Cut into 8 wedges and place them on a parchment-lined baking sheet.
Chill the Dough(Optional but recommended). For flakier scones, chill the shaped scones in the refrigerator for 15-20 minutes before baking.
Bake to Perfection. Preheat the oven to 400°F. Brush the tops of the scones with a little extra heavy cream for a golden finish. Bake for 18-22 minutes, or until the scones are golden brown.
Cool and Serve. Let the scones cool slightly before serving. Enjoy them warm with butter, jam, or an extra drizzle of chocolate.