Gather all materials to be used.
Clean and completely dry glass container(s) to be used.
Remove vanilla beans from packaging and lay flat on cutting board. Using a sharp knife, slice down the middle of the bean. How many vanilla beans you use depends on how large your container is. For the one I used in this recipe, which held about 5-6 oz, I used 5 beans.
Pack sliced vanilla bean into glass jar, cutting it horizontally if the bean is too large to bend into the jar all the way. You'll want the vanilla bean to be entirely submerged.
Using a funnel, or extremely steady hand, carefully pour brandy into the glass jar. Be sure to entirely cover the vanilla beans.
Seal the container. Using a label or piece of tape, write the date on the jar. Set aside in a cool, dark place, for at least 3 months. The longer it sets, the stronger the flavor.