- Get a bottle of vodka.
- Get 6 vanilla beans.
- Slit the beans, stick them in the bottle, shake it up.
- Put it in a cupboard for a few months.
As you use it up, you can top it off with more vodka, and if you need a vanilla bean for something, you can pull one out and replace it with a fresh one. So it can be a fun sort of ongoing thing. Yum!