Plug in the bubble egg waffle maker and preheat for 5 minutes
Combine flour, sugar, cornstarch, and baking powder in a medium mixing bowl with a whisk.
Add milk, eggs, olive oil, and vanilla extra, whisk until the wet and dry ingredients are combined and the batter doesn’t have any large lumps.
When the batter is ready and the egg waffle maker light is green, I quickly rub a stick of butter on both sides of the hot bubble egg waffle mold or use a silicone brush to brush on olive oil.
Work quickly to pour approximately ¼ cup of batter to the center of the egg waffle maker and use a heat proof spatula to even out the batter and so that the outer “bubbles” are at least partially filled (add 1-2 tablespoons more batter if needed).
Lower the top lid of the waffle maker, grab both handles and flip the waffle maker over to coat the other side, and set a timer for 2 minutes. The waffles are ready when the top lid puffs up a tiny bit and you can see from the side that the waffles are golden brown.
Remove the waffle from the egg waffle maker. (I find it easier to loosen it from the top lid onto the plate rather than lift it up from the bottom lid)
Serve with ice cream and toppings, repeat with the remaining batter.