Sift together the dry ingredients.

In a separate bowl, beat the sugars with the oil. Add the egg, vanilla, and beat to combine.

Combine the wet and dry ingredients, and fold in the chocolate chunks. Roll the dough into 1.5 tablespoon balls and chill for a few hours or overnight.

Preheat the oven to 165 celsius. Bake the cookies for 11 minutes. Top with sea salt.