2 cups minus 2 tablespoons (8 1/2 ounces) cake flour
1 2/3 cups (8 1/2 ounces) bread flour
1 1/4 teaspoons baking soda
1 1/2 teaspoons baking powder
1 1/2 teaspoons coarse salt (I used kosher salt)
2 1/2 sticks (1 1/4 cups) unsalted butter
1 1/4 cups (10 ounces) light brown sugar
1 cup plus 2 tablespoons (8 ounces) granulated sugar
2 large eggs
2 teaspoons natural vanilla extract
8 ounces semi-sweet chocolate, chopped into chunks
4 ounces unsweetened chocolate, grated
8 ounces semi-sweet chocolate chips
sea salt