Preheat the oven to 400 degrees F (200 degrees C). Line a cookie sheet with parchment paper.

Whisk together flour, brown sugar, baking powder, cinnamon, and salt in a large bowl.

Quickly shred butter into the flour mixture. Using a fork, gently work butter into the flour until it is the consistency of coarse crumbs.

Whisk buttermilk and egg together in a small bowl and pour over the flour mixture. Use a spatula to combine until just moist. Gently fold in chopped apples until the dough just comes together. Do not over mix.

Turn dough out onto a lightly floured surface, divide in half, and pat each half into a 5-inch circle. Cut each circle into 6 wedges. Place wedges, not touching, on the prepared cookie sheet.

Bake in the preheated oven until light golden brown, about 15 minutes. Transfer to a wire rack to cool, about 30 minutes.