Place the leaves in a 2 cup glass jar and cover with the vodka. Place the lid on the jar.
Allow the extract to sit in a dark place for at least 6 weeks. Shake occasionally.
At this stage the extract will be weak. For best results, strain the vodka, and add another cup of wintergreen leaves. Allow to sit another 6 weeks. I often repeat this step one more time for really amazing wintergreen extract.
Use to flavor ice cream, or add to chocolate chip cookies or brownies.
Notes
*I prefer using fresh leaves for the extract, but dried leaves may be used as well.