In a 1L jar, layer the ingredients starting with the flour, baking soda, and salt, then add the sugars, and top with chocolate chips. Pack each layer down to keep it neat.
1 ¾ cups all-purpose flour, 1 teaspoon baking soda, ½ teaspoon salt, ¾ cup brown sugar, ½ cup granulated sugar, 1 ½ cups semi-sweet chocolate chips, Optional ½ cup chopped nuts for an extra layer