Combine all ingredients except for the alcohol in a pot over high heat. Remove pot from the stove and add alcohol. Return pot to the stove and bring to a boil for 5 minutes.
Turn off heat and let mixture sit in a cool, dry place, covered, overnight. Strain the liquid through 6 layers of cheesecloth and funnel into desired bottles.
Store in a cool, dry place away from light for 3 weeks to 30 days.