Using a sharp knife, split open each of the 4-8 vanilla bean pods lengthwise. No need to totally cut in half, just make sure the inside is exposed.
Place the spliced bean in a glass jar that can fit 1 1/2 cups of liquid and has a tightly fitting cap.
Over with 1 cup vodka. You can use a little less or a little more, it won't make a huge difference in the result, just make sure the beans are totally covered.
Secure lid and place in a cool, dry and dark place for a minimum of 8 weeks, but up to 12 months.
If you remember, try to shake it every week or so.
Strain before using.
If you've tried this recipe, come back and let us know how it was in the comments or ratings.
Notes
Can be diluted to 75% extract and 25% water. Storage: Since it is suspended in alcohol, the shelf life never really expires. It will have some sediment in the bottom from sitting though. I recommend our it through a piece of cheesecloth or a fine mesh sieve to make sure the sediment from the pod doesn't come through.Freezing: Vanilla extract will not freeze since it is made from alcohol.