3 vanilla beans
1 cup cheap vodka (rum works too, and can create a darker, more complex vanilla)
A glass jar
1. Carefully slice the vanilla beans lengthwise with a sharp knife.
2. Combine the vanilla beans and the vodka.
3. Leave the mixture to infuse, shaking occasionally, for 2 months or longer, until infused.
As you start to get to the bottom of the mixture, top it up with more vodka and an extra bean if you have one. Voila! Never ending jar of vanilla.