Slit the beans long-ways then cut into smaller pieces. Place them into the jar or bottle.
Completely submerge your beans by adding 8 oz of your favorite vodka, rum, bourbon, or brandy.
Secure the lid on the jar or bottle and give your new delicious concoction a shake 1-2 times weekly.
Wait about 6-12 months for the vanilla beans to magically turn the alcohol into pure, homemade vanilla extract. After 6 months, most of the extraction is finished. The vanilla beans could be removed, but if you leave the vanilla beans in the bottle, the flavor continues to evolve like wine does.
Store your vanilla extract out of direct sunlight and at room temperature and it will last literally forever, if you don't use it up.