Preheat the oven to 325°F and grease an 8x8x2-inch pan with non-stick spray or softened butter.
In a large mixing bowl, combine the extra virgin olive oil and chocolate and whisk to combine. Add the white and brown sugar and whisk again. Add the whole eggs and yolks, one at a time, whisking after each. Add the vanilla and whisk a final time.
In a medium-sized bowl, whisk together the dry ingredients. Add the wet ingredients to the dry ingredients gradually.
Transfer the batter to the prepared pan and bake for about 25 mins., rotating at the halfway point, until a toothpick comes out with moist crumbs. Do not over bake!
Serve slices warm from the pan or wait for the brownies to cool – your choice.