Mix starter, milk, 30ml (2 tbsp) oil and egg into a bowl or large measuring cup. Use a whisk or fork to combine well.
Whisk in the dry ingredients and mix until smooth.
Brush the remaining 15ml (1 tbsp) of oil onto your hot waffle iron. Depending on your waffle iron, ladle in the recommended amount of batter and cook for about 3 – 5 minutes (again depending on your waffle iron).