Preheat the oven to 350°F. Line two cookie sheets with parchment paper. Set to the side.
In a medium mixing bowl, whisk together the flour, baking soda, and salt. Set to the side.
In a stand mixer (with paddle attachment) or using an electric handheld mixer, cream together the butter and sugar until fully combined and creamy. It should take about 1 - 2 minutes.
Add the maple syrup, vanilla extract, egg, and egg yolk. Mix until combines, be careful not to over whip.
Gradually add in the flour mixture and mix until the dough is combined and slightly “sticky.” Mix in the chocolate chips BY HAND with a spatula.
Using a cooking scooper, portion out about 1.5 Tablespoons of dough for each cookie. Use your hands to roll them into balls and evenly space them out on your lined cookie sheets and press a few extra chocolate chips on top of each dough ball. This recipe makes about 22 - 26 cookies.
Bake for 10 - 13 minutes, until edges are slightly golden. They might look underdone, but as they cool, they will sink and cook further. Cool for 5 minutes on the baking tray before transferring to wire racks to cool completely.