This is one of the things I tried a few years back and now keep handy all the time. Making vanilla sugar is super easy, too. I keep mine in a quart jar in the cupboard, and when it starts to run low, I just top it up with more sugar, give it a shake, and leave it for a while before using it again.
Ingredients for 1 quart jar
1 vanilla bean pod
granulated sugar, to fill
Take the vanilla pod and carefully cut into it, lengthwise, to split it open. Cut the entire pod into 3 or 4 pieces.
Pour sugar, with cut up pod pieces, into the jar, leaving an inch or two of head space. Seal the jar tightly, then shake thoroughly to distribute the pod pieces throughout.
Set jar aside for a week before using. Shake occasionally.
If you wish to use the sugar in baking, which can be done to replace vanilla in a recipe that uses both vanilla and granulated sugar, make up a larger batch. If you went up to a gallon (4L) size container, two vanilla bean pods would be enough.
The vanilla bean pods will continue to flavour the sugar for a long time, as fresh sugar is added to the jar to refill. I’ve had mine for about 3 years, give or take a few months, and am just now thinking of refreshing the vanilla bean pieces. I rarely use it for baking, but then, we don’t bake sweets very often. Instead, I keep a separate sugar bowl for vanilla sugar on the table for our tea.
That’s it! Easy peasy!