Use a knife or vegetable peeler to remove the orange part of the peel. Avoid the white part and the bitter white pith.
Add the zest into a clean jar.
Cover the zest with alcohol until everything is completely submerged. The alcohol will help extract and preserve the orange oil which is responsible for the orange-y flavour!
Add a lid and shake the jar to make sure everything is covered.
Set it in a dark, cool place for 4-6 weeks away from direct sunlight. If you want a stronger extract, you can leave it for 6-8 weeks. Aim to shake it daily to keep everything moving.
After 6 weeks, use a mesh strainer or cheesecloth to strain off the extract.
Use a small funnel (or your best aim) to bottle the extract. And that’s it!