Place fresh peppermint leaves in a large, clean glass jar and pour on the solvent ensuring that the herb is covered.
Close and label your jar with the name of the herb, solvent, and the date.
Shake the jar for 1-2 minutes.
Store in a cool dark place for at least 30 days (or longer), shaking the jar every 1-2 days.
After 30 days you are ready to strain out the herbs. Pour the jar through a mesh strainer or cheesecloth. (There are some new fancy tools for this I have found like this herb press that helps make it less messy and extracts every last drop).
Squeeze out the herb to get all remaining liquid.
Discard or compost your herbs.
Pour your finished tincture into a clean dark class bottle using a funnel.
Close and label your jar with the name and date of your tincture.