If you’re using fresh peppermint leaves, wash and dry the leaves.
Use a knife, mortar and pestle, or a food processor to cut down the leaves. This is done to maximise the surface area that is exposed to alcohol which the tincture is steeping.
Add the fresh or dried leaves and stems to a clean mason jar (or whatever clean glass jar you have on hand).
If you’re using fresh peppermint, fill the jar about ¾ of the way full. You want the leaves to be completely covered in alcohol, so leave a bit of space at the top.
If you’re using dried mint, fill the jar about ½ of the way full to leave room for the plant material to absorb the alcohol.
Cover everything in alcohol. If the peppermint floats to the top, use a wooden spoon to push it under the alcohol. Use whatever alcohol (as long as it’s 80-proof or above) you have on hand.
Put a tight lid on the jar and shake it to ensure everything is covered with alcohol.
Date and label the jar and put it in a cool, dark spot away from direct sunlight (like a dark cabinet).
Leave it sit for 6-8 weeks and try to shake it once a day to keep everything submerged in alcohol.
After 6-8 weeks, use cheesecloth to strain off the liquid. You can also use a fine mesh strainer or a coffee filter. The coffee filter will take the longest, but will be most effective at straining off the tincture.
Add the strained tincture to a small amber glass dropper bottle. If you have excess liquid that doesn’t fit in the dropper bottle, you can store it in your glass jar.
Label and date the dropper bottle and it’s ready to use. That’s it! You’ve made your own mint extract.