Preheat an oven to 375°F. Combine the flour, baking powder, salt, sugar, and light brown sugar in a large bowl. Combine the butter with the flour until it resembles a coarse meal.

Add 10 ounces of the chocolate chunks and toss to combine. Combine the milk and vanilla extract in a small bowl. Add to the large bowl with the flour and mix together until just combined (do not overwork).

Transfer the dough onto the countertop and form into an 8 inch wide disc. Cut into 8 portions, like a pizza. Prepare a baking sheet with parchment paper and non-stick spray.