A common ingredient in many tiki drinks, passionfruit syrup is simple to make - once you find the passionfruit purée, that is.
We recently set out on a mission to find passionfruit. And we succeeded - after a few stops. What we discovered is that you can often find it in Hispanic or global markets. Check the freezer section and you'll see that they have froze fruit pulp. In this case it was 100% pure passionfruit puree. Nice. (We found ours at K&S World Market on Nolensville Road)
One thing about passionfruit, is that is not naturally very sweet. In fact, it's sour as hell. To make this syrup, you'll essentially make a simple syrup compounded with the passion fruit purée. Once made, it will keep refrigerated for a couple weeks. If you make a large batch like this, feel free to freeze some of the syrup in ice cube trays so you can thaw out bits at a time when you need it.
2 cups passionfruit purée
3 cups sugar
1 cup water
Bring all ingredients to a boil in a large saucepan and cook until sugar is dissolved. That's it.