Cream together in mixing bowl butter and sugars. Once a pale yellow add egg. Add vanilla and yogurt until combined. Add all dry ingredients in 2 parts– do not overwork. Add chips at end. Place on cookie sheet 12 balls at a time. Bake at 350′ for 12 minutes. Turn off oven and bake for another 6-8 minutes. Once out let rest for 10 minutes. Enjoy!