2. Chop or crush mint leaves. Chop up fresh mint leaves with a knife or crush them with a clean cup bottom to let more mint oil flow out.
3. Put mint leaves and wine into a glass jar with a lid. Fill the jar with mint leaves and leave a space of 1.25 cm at the bottle mouth, so that the mint tincture is stronger.
4. Put the mint leaves in a jar for several weeks, shaking them several times during the period.
5. Filter the peppermint oil into a brown glass bottle and finish the extraction.