Place vanilla beans in a tall jar; cover with vodka. Seal jar tightly. Let stand in a cool dark place at least 6 weeks, gently shaking jar once a week. Yield: 2 cups.
Cut your vanilla beans in half, then split open each half to expose the vanilla seeds on the inside of the pod.
Place cut vanilla beans inside your glass bottle.
Add vodka, filling up to the neck of the bottle.
Seal tightly and store the bottle in a cool, dry place.
Every few days, tilt your bottle upside down to gently mix the liquid inside.
After 5-6 weeks, you have extract! (If you leave in your vanilla beans, when you start running low, just add more vodka and wait a little.)