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.
03 - Add cold, cubed butter to dry ingredients. Use a pastry blender or fingers to cut in until mixture resembles coarse crumbs.
04 - In a separate bowl, whisk heavy cream, egg, and vanilla extract until smooth.
05 - Pour wet ingredients into dry mixture and stir gently just until combined.
06 - Gently fold chocolate chips into the dough, avoiding overmixing.
07 - Turn dough onto lightly floured surface and pat into a 7-inch diameter circle approximately 1 inch thick.
08 - Cut dough into 8 wedges and arrange on prepared baking sheet.
09 - Brush tops of wedges with additional heavy cream for a golden finish.
10 - Bake for 16 to 18 minutes until golden brown and set.
11 - Transfer scones to a wire rack and cool for 10 minutes.
12 - Whisk powdered sugar, milk or cream, and vanilla extract until smooth. Drizzle glaze over warm scones.