Preheat oven to 400°F and line a baking sheet with parchment.
Whisk flour, sugar, baking powder, and salt in a large bowl.
Cut in the cold butter until the mixture looks like coarse crumbs with pea-sized bits.
Fold in the chocolate chips to distribute evenly.
Whisk cream, egg, and vanilla in a small bowl until smooth.
Make a well in the dry mix, pour in the wet, and gently fold just until a shaggy dough forms.
Turn dough onto a lightly floured surface and pat into an 8-inch round, about 1 inch thick.
Slice into 8 wedges and transfer to the prepared sheet, spacing the pieces apart.
Brush tops with cream and sprinkle with coarse sugar.
Bake 15–17 minutes until golden brown at the edges. Cool 10 minutes before serving.