To make 1 quart:
3.5 cups vodka (not the good stuff, but get a decent brand)
1/2 cup bourbon or sometimes brandy or sometimes rum (another 1/2 cup vanilla would also work)
2oz vanilla beans, each one split down the middle
Place all in a quart jar and shake well - you should see the seeds in the liquid. Repeat every couple days for three months.
I started making my own vanilla because I wanted a strong vanilla with no fillers. I only brew double strength. What is "Double Strength" or "Double Fold" vanilla? Brewed with twice the vanilla beans for more of the vanilla scent and flavor.
No corn syrup. No water. No artificial flavors