Preheat the oven to 375 degrees.

Line a muffin tin with cupcake liners.

In a medium bowl combine the flour, baking powder, baking soda, and salt. Mix well and set aside.

In a large bowl cream together the butter and sugar. Add in the vanilla and mix well.

Stir in the mashed bananas and papaya and mix well.

Cut the passion fruit in half and scrape the insides (seeds and all) into the bowl with the butter. Mix well.

Add the flour mixture to the butter mixture and mix well.

Fill the muffins cups 3/4 of the way full.

Bake for 20 minutes.

Remove from the oven and cool for 5 minutes. Remove from muffin pan and cool completely on a wire rack.

If desired sprinkle toasted coconut on top of the muffins.