01 -
In a medium bowl, whisk together the all-purpose flour, cake flour, baking powder, baking soda, and kosher salt. Set aside.
02 -
In another medium bowl, cream together the softened butter and light brown sugar until fluffy, about 2-3 minutes.
03 -
Add the room-temperature egg and vanilla extract to the butter mixture. Mix until just combined.
04 -
Using a rubber spatula, gently fold in the flour mixture until just combined with no flour bits remaining. Don't overmix.
05 -
Fold in all three types of chocolate chips - white chocolate, semi-sweet chocolate, and dark chocolate - until fully incorporated throughout the dough.
06 -
Cover the dough and refrigerate for at least 1 hour, or overnight if you have time. This is crucial for getting that thick, bakery-style texture.
07 -
Preheat your oven to 400 degrees and position the rack in the middle of the oven.
08 -
Scoop out large portions of dough - about 140g per cookie for bakery-style thickness - and roll gently into balls. Place them on parchment-lined baking sheets, spacing them about 2 inches apart.
09 -
Bake for 10 to 11 minutes, or until the edges are lightly browned but the centers still look slightly underdone.
10 -
Let the cookies rest on the baking sheet for 5 minutes - this is important as they'll continue to set. Then carefully transfer them to a wire rack to cool completely.