Preheat oven to 350℉ (180℃)
In a medium bowl, whisk together flour, salt, baking soda, and baking powder. Set aside.
2 cups All Purpose Flour, ½ teaspoon Salt, ¾ teaspoon Baking powder, ½ teaspoon Baking soda
Using a stand mixer with the paddle attachment, begin creaming the butter, granulated sugar and brown sugar until light and fluffy (2 - 3 minutes on medium speed). Scrape the bowl as needed. (note: a hand mixer may also be used)
5 ounces Unsalted butter, room temperature, ½ cup Granulated sugar, ¾ cup Light brown sugar
Add the egg to the mixing bowl. Mix on medium speed until combined, scraping the bowl as needed.
1 Large Egg, room temperature
Add the flour mixture and mix on low speed until combined.
Stir in the chocolate chips by hand.
1 ½ Cups Chocolate chips, bittersweet