Split the vanilla beans lengthwise using a sharp knife, but leave about a centimeter at the top intact so the beans remain connected.
Place the split vanilla beans into a glass bottle and pour the alcohol over the beans, ensuring they are fully submerged. Seal the bottle tightly and shake well.
Store the bottle in a cool, dark place, such as a pantry or cupboard. Shake the jar gently every week or so to encourage the extraction process.
Allow the vanilla beans to steep in the alcohol for at least 8 weeks. The longer it steeps, the stronger the flavor will be. Alcohol helps preserve your vanilla extract and maintain a long shelf life.
After the desired steeping period, strain the extract to remove the vanilla beans.
Pour the extracted liquid into smaller, clean bottles or jars for easier use and storage. Label the bottles with the date and type of extract.
Store the homemade vanilla extract in a cool, dark place, away from direct sunlight or heat.