Once you've used all of your homemade extract, you'll have vanilla beans left behind. Since the beans aren't cheap, I like to find ways to reuse them. I will often add some used vanilla beans in with fresh beans to make another batch of extract, there usually isn't enough flavour left in the beans to make more extract on their own, but they will still contribute some more flavour when used alongside fresh beans.u003cbr/u003eu003cbr/u003eI also like to use the used beans to make vanilla sugar. First, you'll need to dry out your beans. I have a food dehydrator so I use that, but you can also dry the beans out in the oven (spread them out on a baking paper lined baking tray and pop them in the oven on the lowest heat setting, with the fan on if your oven has one) until they're dry. Try to get them super dry, as any moisture in the beans will cause the sugar to clump. Once they're dry, all you need to do is add them to some sugar. I use caster sugar, but regular sugar is great too. Put the sugar and the beans into a jar or airtight container, give it all a shake and leave it to sit for a week or two before using. Just like with the extract, the longer you leave it, the more flavour it will have.