Slice vanilla bean pods lengthwise to expose the seeds. I recommend using a kitchen scale to weight out one ounce of beans to make sure you have the correct amount.
Place the beans in a clean 16 oz bottle.
Pour bourbon over the beans, making sure they are completely submerged.
Seal the bottle tightly and give it a good shake.
Store the bottle in a cool, dark place away from direct sunlight for at least 6 months, but a year is even better. Shake occasionally when you visit your pantry. The extract will get better with time, so feel free to let it sit longer if possible.
After 6 months, your homemade vanilla extract is ready for use or gifting. If desired, strain the extract before use, but you can also leave the beans in the bottle to continue infusing.