Evenly divide the vanilla beans amongst the containers you are using and pour the vodka over top. Give it a good shake.
Store covered in a cool dark place for at least 4-6 weeks, shaking the bottle several times a week.
When your vanilla extract is ready to be used, strain out the vanilla beans and any residue, if you'd like. A strainer, cheesecloth, nut milk bag or even a ladies nylon stocking would all work just fine. I like giving mine as a gift with the beans still in the bottle and with a date printed on the bottle for when it is ready to use.
The extract should be stored at room temperature and, like a fine wine, it will only get better the longer it sits.
Recipe by Tasty Yummies at https://tasty-yummies.com/how-to-make-homemade-vanilla-extract/