Wash and chop the plums, removing the pits.

In a large glass jar, add the chopped plums and pour in the vodka.

Seal the jar tightly and store it in a cool, dark place.

Shake the jar gently every few days to mix the ingredients.

After about 4 weeks, prepare simple syrup by combining the sugar and water in a saucepan. Bring to a boil, then let it cool.

Once the infusion is complete, strain the liqueur through a fine mesh strainer or cheesecloth into a clean bottle.

Mix the cooled simple syrup into the strained liqueur to achieve your desired sweetness.

Transfer the finished liqueur into a clean bottle and seal it. Let it age for at least another week.