Preheat the oven to 350°F/175°C. Line a baking sheet with parchment paper.
In a medium bowl whisk together flour, baking soda, baking powder and salt. Set aside.
In a mixing bowl, whisk the melted butter, granulated sugar, and brown sugar until light and shiny. You can use an electric mixer fitted with the paddle attachment if you prefer to. Add egg yolk and vanilla extract and whisk until combined. Add flour mixture and use a wooden spatula to mix together the dough. Do not overmix. Gently fold in chocolate chips.
Roll the dough into a ball and press it flat in your hands, then transfer to a prepared baking sheet and shape it into a 6-inch disk. Add in some chocolate chips (about 1 tablespoon) on top if desired.
Bake in the oven for 13-15 minutes, until the edges are a light golden brown and the center looks barely underdone. Allow the cookie to cool on a baking sheet for 5-10 minutes then transfer to a cooling rack to cool completely.
Store cookies in an airtight container for up to 3 days, serve at room temperature.