This single Levain chocolate chip walnut cookie recipe is the ultimate copycat cookie for your favorite Levain Bakery cookie but only makes enough for one large cookie!
Add in the vanilla extract and the egg yolk and mix to combine.
1/4 tsp vanilla extract, 1 egg yolk
Mix in the flour, baking soda, cornstarch, and salt until the flour mixture disappears. Fold in the chocolate chips and walnuts.
1/2 cup AP flour, 3 tbsp cornstarch, 1/8 tsp baking soda, 1/8 tbsp salt
Roll the cookie dough, place it on a baking sheet, top with more chocolate chips if you'd like, and bake in the preheated oven for 14 minutes. Let the cookies cool on the baking sheet for 10-15 minutes before enjoying it!