Combine bread flour, cake flour, sea salt, baking soda, and baking powder in a bowl.
Whisk thoroughly to combine. Set aside.
Beat the butter and sugars together until light and fluffy, about 5 minutes.
Add eggs one at a time, mixing well after each addition. Stir in vanilla extract.
Slowly add the dry flour mixture to the wet ingredients.
Mix until just combined. Fold in the chocolate, making sure not to overmix.
Wrap the dough tightly in plastic wrap and refrigerate for 72 hours.
This resting time allows the flavors and textures to develop fully.
Preheat oven to 350°F (175°C).
Scoop dough into large balls and place on a parchment-lined baking sheet, spaced well apart. Bake for 12-15 minutes, keeping an eye on the edges to ensure they are golden brown but not overdone
Cool on racks.