Sift together the flour and baking soda, and set aside.

Cream your butter and sugars. Add egg, egg yolk, and vanilla.

Slowly mix in the flour mixture into the butter mixture, mixing well. Add the chocolate chips.

Scoop out the dough, set on a parchment lined cookie tray, and refrigerate for at least an hour. The longer the better!

Preheat oven to 375 degrees F. Bake for 10 to 12 minutes, or until the edges are golden brown. You want to take them out when they look slightly undone, as they’ll continue to cook even after you take them out. Let cool completely and store in an airtight container.