Step 1: Gather your vanilla beans, chosen alcohol, and clean glass bottles. Ensure your bottles are sterilized by washing them in hot, soapy water, rinsing thoroughly, and allowing them to air dry completely or drying them in a low oven.
Step 2: Using a sharp paring knife, carefully split each vanilla bean lengthwise down the middle, from just below the stem end almost to the tip. You can leave the very tip intact to keep the bean together, or cut it completely open. If the beans are very long, you can cut them in half crosswise after splitting to ensure they fit well into your bottles.
Step 3: Place the prepared vanilla beans into your clean glass bottles. For an 8-ounce bottle, aim for about 5-7 whole beans (split). For a larger quantity like a quart, you'd use roughly 20-25 beans. The more beans you use per volume of alcohol, the stronger your finished extract will be.
Step 4: Pour your chosen alcohol (vodka, bourbon, rum, etc.) over the vanilla beans in the bottles, ensuring the beans are fully submerged. Leave a small amount of headspace at the top of the bottle.
Step 5: Securely cap or cork your bottles. Give them a gentle shake to ensure the alcohol fully coats the beans. Label each bottle with the date it was made, the type of alcohol used, and the type of vanilla beans.
Step 6: Store your bottles in a cool, dark place, such as a pantry or cupboard. Direct sunlight and heat can degrade the flavor.
Step 7: For the best results, shake the bottles gently once a week for the first month, and then every few weeks thereafter. This helps redistribute the beans and ensures even extraction of flavor.
Step 8: The vanilla extract will need to infuse for a minimum of 6-8 weeks. However, for a truly rich, deep flavor, I highly recommend letting it age for 6 months to a year. The longer it infuses, the more robust and complex the flavor will become. You’ll notice the color of the alcohol gradually darkening to a beautiful amber or dark brown.
Step 9: Once your vanilla extract has reached your desired strength, you can start using it! There's no need to remove the beans; they will continue to infuse and deepen the flavor. For a continuous supply, simply top off the bottle with more alcohol as you use the extract, ensuring beans remain submerged.