Mix the flour, baking powder and sugar in a large bowl. Then add your cold butter, mix until the butter has just combined, as in the mixture still looks pretty dry but there are not large chunks of butter.
Add half of the milk and egg mixture and continue to add until you have a cohesive scone batter, you want your scone batter to be pretty dry so it holds its shape
Fold in the chocolate chunks and knead the dough a few times then roll out to 1-inch thickness.
Place 8 on a lined baking sheet then brush with an egg wash and sprinkle a little bit more sugar on top.