Preheat oven to 325 degrees.
Stir sugar and melted butter together until creamy and blended.
Add vanilla, egg, and yolk and blend well.
Mix dry ingredients together in a bowl and add to sugar mixture.
Stir just until dry ingredients are moistened.
Add chips, stir gently- drop by 1/4 cupfuls onto baking sheet....about 2 inches apart.
Bake 17-20 minutes- be careful not to overbake-they should be a little golden brown around the edges