Gather 6 to 8 vanilla beans, 1 cup of vodka, and a clean glass bottle or jar with a tight lid
Split each vanilla bean lengthwise, leaving one end attached if desired
Place the vanilla beans into the jar
Pour the vodka over the beans until they are fully submerged
Seal the jar tightly
Store the jar in a cool, dark place
Shake the jar once or twice a week
Let the extract steep for at least 8 weeks
For best flavor, let it steep for 4 to 6 months
Use the extract as needed after steeping
Top off with more vodka as you use it, if desired
Add more vanilla beans over time for a stronger extract