Preheat your oven to 375F.

Whisk together the flour, baking powder and salt and set aside. Using a stand mixer, cream the butter and sugar together until smooth. If you don't have a stand mixer, beat vigorously by hand in a mixing bowl.

Add the corn syrup, egg and vanilla and beat until combined. Scrape down the bowl and gradually add the flour mixture, beating just until combined. Stir in the chocolate chips. Using a spoon, scoop out a ball of dough, roll it a moment in your hands and then drop it onto a lightly greased cookie tray. Slightly flatten the balls but leave lots of room in between to allow the cookies to expand.

For a soft, chewy cookie, bake for exactly 12 minutes. For a cookie with a bit of crispy crunch, bake for exactly 15 minutes.

Cool for 2 minutes on the cookie tray and then remove to cool further.