Chocolate Chip Cookies

I found this recipe on the Sunset magazine website. As usual, I got back on the quantities of sugar to fit my taste.

 Ingredients:
Dry ingredients:
1 ½ cups all-purpose flour
1 tsp baking powder
1/4 tsp baking soda
1/2 tsp salt
Wet ingredients:
1 egg
1 egg yolk
1 stick butter at room temperature
1/2 cup brown sugar
1/4 cup white sugar
1/4 cup powder sugar
1 tsp vanilla extract
Other:
1 cup chocolate chips

Directions:
Preheat oven to 375°.
In a bowl, mix the dry ingredients together.
In a stand mixer bowl using the medium speed, beat all the wet ingredients until well combined. Turn the speed to low and add the dry ingredients into the wet ingredients. Fold in the chocolate chips.
Drop teaspoonfuls of entire batter onto the cookies sheet. Bake for 15 minutes or until the edges of all the cookies are slightly brown. Let cool completely before storing in a cookie jar.