Choose well-ripened prunes. It is best to clean the pits beforehand and grind the fruit into a pulp.
Pour the fruit into a large and suitable container. After 3-4 days, add sugar dissolved in water (25 degrees) in the amount of sugar-water 1-3(4).
The sugar must be completely dissolved in water, the proportion being 20 kg of sugar, the water should be 60 l. Stir until dissolved and stir into the fruit pulp.
At 20-25 degrees, fermentation proceeds quickly - for several days.
The material thus prepared is stirred 3-4 times a day - the more, the better. After about 14 days the fermentation should have finished and the mixture should have cleared on top, but this depends on the temperature, the quality of the sugar and the frequency of stirring. Do not close the can during fermentation. It is best to measure the sugar content with a sugar meter, which should read 17-18%. If the sugar content is more - add water, if it is less - sugar, respectively.
There should be a distance of about 30 cm between the upper edge of the vessel and the material, at least during fermentation.