Split 5 to 10 vanilla beans lengthwise
Place the beans in a clean glass bottle or jar
Add 1 cup of vodka, bourbon, or rum per 5 beans
Make sure the beans are fully submerged
Seal the container tightly
Store in a cool, dark place
Shake the bottle once a week
Let it steep for at least 2 months
Wait 4 to 6 months for stronger flavor
Strain if desired before using
Refill with more alcohol as needed to keep beans covered