Preheat oven to 325°

Line 2 half baking sheets with parchment

In a stand mixer, beat the sugars and butters on medium until smooth. Mix in the egg, vanilla, and baking soda

In a medium bowl, stir together the flour and salt, then add 1/2 portion at a time into the batter. Mix in the chocolate chips

Cover and refrigerate the dough for a half hour

Scoop the cookie dough using a small ice-cream scoop and place 3 in a row, with 4 rows on each sheet. Bake for 14-16 minutes, or until pale golden brown

Remove from the oven and let cookies set for 2-3 minutes on the baking sheet.

Using a flat spatula, place on a wire rack to cool for 15-20 minutes