Ingredients
1 cup plus 2 teaspoons all-purpose flour
1 cup semisweet chocolate chips
1 large egg
1/2 cup butter, at room temperature
1/2 cup coarsely chopped walnuts
1/2 teaspoon baking soda
1/2 teaspoon salt
1/2 teaspoon vanilla extract
1/3 cup brown sugar
1/4 cup granulated sugar