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

In a mixing bowl, stir together the flour, cocoa powder, baking powder, salt, baking soda and sugar.

Using a pastry blender or two knives, cut the butter into the flour mixture until mixture looks like coarse crumbs.

In a small bowl, whisk together the milk and egg. Pour into mixing bowl and stir until just combined.

Stir in the chips.

Turn the dough out onto a lightly floured work surface. Knead very lightly and form into an 8-inch circle. (Add a little more flour to the dough if the dough becomes too sticky to handle)

Cut the dough into 8 wedges.

Place the wedges onto the prepared baking sheet. Bake for 12-15 minutes or until golden brown.

Let cool on baking sheet for a minute or so, then transfer onto a wire rack.