Pre-heat to 425° F.
Line a baking sheet with parchment paper.
Prepare a lightly floured work area. Coat your pastry cutter with flour as well.
Using the paddle attachment, in a stand mixer, add the flour, salt, baking powder, and sugar to the mixing bowl. Beat at a medium-low speed.
Add the cubed butter, and mix until the dough forms tiny balls.
In a separate bowl, whisk the egg, vanilla, milk, and then add it to the mixer.
The dough should come together and form a ball.
Remove dough and transfer to your floured work area.
Shape the dough into a 1" thick circle.
Using your pastry cutter, divide dough into 8 pieces, and slightly separate them to give them space to bake.
Bake for 12-14 mins or until golden brown edges form