Make the cookie dough: In a large mixing bowl, cream the butter with an electric mixer on high until creamy. Add the sugars and with the butter, about 1 to 2 minutes. Add the egg, egg, yolk, and vanilla. Mix on medium high speed until just combined and smooth, scraping the sides and bottom of the bowl to make sure everything is incorporated evenly. Add the dry ingredients and chocolate chips and mix until just combined.
3/4 cup salted butter, softened at room temperature , 1/2 cup + 2 tbsp dark brown sugar, packed, 1/2 cup granulated sugar , 2 tsp vanilla extract , 1 large egg, at room temperature , 1 large egg yolk, at room temperature , 2 tsp vanilla extract , 2 1/4 cups all-purpose flour , 3/4 tsp baking powder, 3/4 tsp baking soda, 3/8 tsp salt, 1 1/2 cups chocolate chips