White and Dark Chocolate Chip Cookies

Ingredients 2 1/4 cups of flour ½ teaspoon of baking soda ½ teaspoon of baking powder 1 teaspoon of salt 1 stick of butter [1/2 cup] ¾ cups of brown sugar ¾ cups of white sugar 1 egg 1 egg yolk 1 teaspoon of vanilla extract 1 bar of White Chocolate 1 bar of Dark Chocolate Coarse salt, for the topping