Heat oven to 425 degrees F. Line a baking sheet with parchment.

In a large bowl, whisk together the flour, sugar, baking powder, and salt. Add the butter and, using a pastry blender or two knives, cut it in until the mixture forms small crumbs.

Add the chocolate chips and toss to combine.

In a bowl, whisk together the yogurt, egg, and vanilla. Add to the flour mixture and, using a fork, gently stir until incorporated (do not overmix). Bring the dough together into a ball.

On a lightly floured surface, shape the dough into an 8-inch round (about 1 inch thick). Cut into 8 wedges, separate, and transfer to the prepared baking sheet.