Preheat the oven to 400 F. Line two baking sheets with parchment paper.
Mix together the flour, baking powder, salt, and sugar together in a large bowl.
Incorporate the butter into the flour using a pastry cutter or your hands. The mixture should resemble coarse meal when finished.
Whisk together the egg and milk in a small bowl until well-combined.
Add in one cup of the milk mixture into the flour and mix until just combined and the dough comes together. Add more milk as needed if the dough looks dry.
Separate the dough in half and form into large discs that are one inch thick. Cut the discs to make eight triangles from each. Brush the tops with the remaining milk mixture. Separate each wedge and place on the baking sheets.
Bake for 20 - 25 minutes, or until a light golden brown on top.