Preheat your oven to 350°F (175°C) to ensure even baking.
In a large mixing bowl, whisk together the cake flour, bread flour, baking soda, baking powder, and coarse salt. Set aside.
In another bowl, use an electric mixer to cream together the unsalted butter, light brown sugar, and granulated sugar until light and fluffy, about 2-3 minutes.
Add the eggs one at a time, mixing well after each addition. Then stir in the pure vanilla extract until combined.
Gradually add the dry ingredient mixture to the wet ingredients, mixing on low speed until just combined. Avoid overmixing.
Gently fold in the bittersweet chocolate disks with a spatula, ensuring even distribution throughout the dough.
Use a cookie scoop to portion dough onto baking sheets lined with parchment paper, spacing them apart. Optionally, sprinkle a pinch of sea salt on top.
Bake for 10-12 minutes until edges are lightly golden but centers remain soft. Cool on the baking sheet for 5 minutes, then transfer to a cooling rack.