See below ingredients and instructions of the recipe
1/2 c Brandy
3 Or 4 Vanilla beans
Chop vanilla beans into small pieces, being careful not to lose any
of the bean or the little black seeds.
Drop the pieces inot a clean jar and cover with the brandy. cover
with a tight-fitting lid and keep in a dark place, shaking every 3
days or so.
Extract will be ready in 2 weeks. A touch more brandy can be added
if the beans still seem potent. Mixture can be added to indefinately.
Use just as you would regular vanilla extract, but taste to make sure
the brandy flavor isnot too strong.
Source: Cheaper and Better Alternatives To Store Bought Goods by