Preheat the oven to 325 convection bake (Or 375° F)
Beat butter and sugars in a mixer.
Add egg and vanilla, scraping sides.
Add flour, baking soda and salt.
Add chocolate chips.
Scoop 3 ounces of dough out onto parchment lined cookie sheets.
Bake at 325° convection for about 12 mins. Keep an eye on them the first time as everyone's oven is different! Use a large cookie cutter to help round the cookie when out of the oven.