Line a baking sheet with parchment paper.
Preheat oven to 350•
In a medium mixing bowl, combined soften butter, sugars, vanilla and egg.
Add dry ingredients, gradually.
Add chocolate chips and fold gently.
Drop by tablespoons onto parchment paper.
Bake 13-15 minutes until lightly brown.
Cool completely before serving. Ok to move to racks after a few minutes.