In the meantime, heat waffle iron.
Grease it with butter all over. Be sure to grease the individual grooves, or the batter might stick at times.
Once the waffle iron is hot, add in 2-3 tablespoon of waffle mixture.
Add the mixture depending on the size. Do not add too much, as when you would close the waffle iron, it will spread. If you add too much it would even overflow.
Let this cook for at least 5 minutes or as per the instructions on your waffle maker.
Once it gets half done, I top it with some butter and let it cook again for further 5-7 minutes until nice golden brown.
They are done when they are golden brown all over or when they start leaving the edges of the waffle maker.