New York City's most beloved cookie, the Levain Cookie is perfectly crisp around the edges with an irresistible thick and gooey center. Each bite is loaded with chocolate chips and chunks of walnuts, and better than the last. These are bound to be your new favorite cookie!
Add the butter, brown sugar, and granulated sugar to the bowl of a stand mixer and beat with the paddle attachment on medium speed until combined.
Add the eggs and vanilla and beat until just combined.
Add the cake flour, all-purpose flour, baking powder, baking soda, and salt and mix until just barely combined.
Remove the bowl from the mixer and fold in the chocolate chips and walnut pieces by hand. Cover the bowl with plastic wrap and chill in the fridge for 30 minutes to an hour.
Preheat the oven to 400 degrees Fahrenheit.
Remove the dough from the fridge and weigh out 12 6-ounce portions. Don't roll the dough together, just make it into messy blobs of dough. Levain Bakery doesn't "make baseballs" of the dough and prefers it to be rough and textured.
Bake for 10-11 minutes, until the top and bottom of the cookie are beginning to turn golden brown. Remove from the oven and let the cookies cool on the pan for 12-15 minutes, allowing them to continue cooking.