If you are comfortable with the idea of wine making, here’s a simple recipe you might want to try:
Combine 2 pounds of Mulberries, 2 pounds of sugar, and 3 quarts of water in a stainless steel or enamel pot. Bring to a boil and keep boiling for 20 minutes.
Cool the mixture to room temperature and pour through a strainer into a sanitized one-gallon glass jug. Top off with clean water if needed, and add red wine yeast when the liquid is 80 degrees Fahrenheit or cooler.
Fit a water-filled wine lock to the jug mouth, and ferment in a dark, room-temperature spot for six weeks.
For best taste, decant the wine into bottles and age for a few months. Though you could enjoy the “new” wine right away.