Preheat the oven to 350F.
- Melt butter and leave to cool.
- Add eggs and sugar into cooled butter.
- Add your mashed bananas and vanilla extract.
- Sift in flour together with baking powder and baking soda.
- Mix to combine. Do not overmix.
- Spoon batter into muffin cups.
- Bake for 30 minutes.
Serve in Mariposa Lotus Paper Cups or Tulip Paper Cups.