I googled and this is what I found for you:
To make your own vanilla extract: Cut two fresh (moist and pliable) vanilla beans into small pieces and put them in a small, clean jar. Pour vodka, brandy, or light rum into the jar until the vanilla is completely covered. Seal the jar with a tight-fitting lid, allow the mixture to steep for about at least a month, then strain out the beans using cheesecloth or a coffee filter. The result won't be as strong as commercial extracts, so use more. Substitutes: vanilla powder (use half as much) OR vanilla bean (Extract the flavor by scraping out the seeds and putting them and the vanilla pod into a liquid that's used in the recipe and let it simmer awhile. When the liquid has been infused with vanilla flavor, remove the pod. One inch of fresh vanilla bean = one teaspoon extract. Use a longer piece of vanilla if it's not fresh.) OR imitation vanilla extract (This may be less potent than pure vanilla extract, so you may need to use more.) OR Kosher vanilla sugar (for Passover) OR vanilla-flavored liqueur (1 teaspoon extract = 1 tablespoon liqueur)
Alternatively, you can replace it with maple syrup.
Good luck!
