Warm one pint of distilled water over medium-low heat before adding the dried cherry bark and mullein leaves into the water.
Allow to heat for at least 20 minutes, up to two hours (on lower heat). The longer you warm the herbs, the stronger the cough syrup.
Strain out the herbs, and add the raw honey to sweeten (and for additional benefits).
Upon completion, bottle, refrigerate, and be prepared for the winter cough!
Notes
You can make a large batch and freeze it, then warm it when needed. It will keep in the refrigerator for up to one month and in the freezer for 8-10 months.