I used pisang berangan.
And here is the recipe:
300g mashed banana (pisang berangan tasted good but I have tried with pisang emas too and it wasn't bad)
120g castor sugar
200g melted butter
2 whole eggs
275g superfine flour
5g baking powder
5g sodium bicarbonate
some chopped walnuts
Double boil butter until all dissolved and let it cool before adding milk and egg. Stir until well combine.
Add sugar and salt to mashed banana and mix well until sugar dissolved add in chopped walnuts then add the whole thing to the butter mixture.
Sieve in superfine flour, baking powder and sodium bicarbonate to form a batter.
Fill up muffin cup with the batter. Just fill 3/4 full will do.
Preheat oven to 180C and bake for 20 to 25 minutes.