How to make
In a deep bowl, pour the butter and sugar, beat with a mixer.
Then add the eggs 1 by 1, while beating after each, and continue until in this way you've added the final egg.
After you've stirred the mixture well, add the milk, then stir again until the products mix.
After the milk, add the flour which you've mixed with the baking powder and vanilla. Stir again.
Turn the waffle iron on to heat up and pour the mixture in it.