How to make the famous Levain Chocolate Chip Walnut Cookie? Let's indulge today with this super rich recipe :) This recipe yields 8 pieces of 6ounces cookie. If you want it smaller then you can make 16 pieces. Here's what you'll need: 200 grams cold unsalted butter 3/4 cup brown sugar (130g) 1/2 cup white sugar (100g) 2 large eggs 1 tsp vanilla 2 and 1/2 cup all purpose flour (312g) 1 tsp baking powder (5g) 1 tsp baking soda (5g) 1/2 tsp salt (3g) 2 cups roasted walnuts (roughly chopped) 200g 2