Preheat oven to 375 degrees (F). Line 2 large baking sheets with parchment paper and set aside. In a medium sized bowl whisk together the flour, cornstarch, baking soda, and sea salt; set aside.

In the bowl of a standmixer fitted with the paddle attachment, or in a large bowl using a handheld electric whisk, combine the coconut oil, both sugars, and the vanilla extract; beat on medium-speed until light and fluffy, about 2 minutes. Add in the eggs, one at a time, beating well after each addition. Gently fold in the flour mixture with a wooden spoon, stirring only until the flour begins to disappear. Fold in the chocolate chips.

Roll 3 tablespoon sized balls of dough between your palms to form a ball (they should be big; almost a 1/4 cup), then place on prepared sheet (make sure to leave enough room in between each cookie for inevitable spreading). Continue this process until all the dough has been rolled.

Place baking sheets in preheated oven and bake for 10-12 minutes, or until golden at the edges but still soft in the middle.

Let cookies cool for 5 minutes on the sheet before transferring to a wire rack to cool completely.