Preheat your oven to 375°F. Line your baking sheets with baking mats.
In a mixing bowl, whisk together the flour, corn starch, and baking soda.
In your mixer, beat together the butter and sugars.
Add in the eggs and vanilla, further mixing.
Add the flour mixture a bit at a time until it just starts to come together. Don't worry about over-mixing; mixing more will make it more cake-like.
Fold in the chocolate chips.
Divide the cookie dough into ⅓ cup balls, flatten to about an inch thick, and arrange on your baking sheet.
Bake for about 12 minutes. They'll look a bit under-done, but they'll be fine once the tops are just starting to brown.
Let rest for 10 minutes, then move to a cooling rack to finish cooling.