Step 1

Combine the cake flour, bread flour, baking soda, baking powder and coarse salt in a large bowl. Stir to combine and set aside.

Step 2

In a large mixer add the butter and sugars and mix for 5 minutes until fluffy. Add the eggs, one at a time, making sure to scrape down the sides of the bowl in between. Add the vanilla and combine.

Step 3

Add the dry ingredients a little at a time and mix until just combined. Add the chocolate discs and fold them into the batter. Cover the dough and refrigerate for up to 72 hours.

Step 4

When ready to bake, preheat the oven to 350 degrees F. Scoop 1/4 cup sized cookie dough balls onto a parchment lined baking sheet, 6 cookies per sheet and sprinkle the tops with maldon sea salt. Bake the cookies for 16-20 minutes until golden brown. Remove from oven and set aside to cool. If the cookies are a little puffy, bang the pan on the counter to release any excess air pockets. Or use a spatula to flatten the cookies to make more dense.