Use a sharp knife to make a slit for one end of a bean to the other end. Use the same knife to scrape the seeds from the bean. Cut the vanilla bean in half. Place the seeds into a bottle with a tight-fitting lid.

Pour vodka into the bottle. Use a funnel so it is easier to pour the vodka into the bottle.

Cover the bottle and shake well to combine.

Store vanilla extract at room temperature away from direct sunlight. Shake the bottle about once per week.

Vanilla extract is ready to use after about 1 month. For more intense flavor, let it steep for about 6 months before using.

You can use homemade vanilla extract with the beans still in the jar or you can strain it before use. Add more vodka to the beans as you use the vanilla extract to make more vanilla extract. Also add more vanilla beans if the vanilla flavor isn't as intense.