Just found this recipe
Traditional Method:
- Rinse mint leaves and add them to a canning jar. You may need to pack them in with a spoon to get everything to fit.m
- Pour vodka over the leaves. Put a lid on the jar and shake a few times.
- Store in a cool dark place, shaking once a day for the first few weeks. After that, shake it whenever you think of it.
- The mint extract will be ready when the liquid smells strongly of peppermint and not alcohol.