The first step in making cherry jam is to wash the cherries, pour it into a colander, let the liquid drain. Remove bone with toothpick or pin/needle. Cut cherries in half or leave whole. Sprinkle 400 g. granulated sugar, knead until smooth, leave for 2 hours.
While the berries are juicing, boil an 800 gr syrup. sugar and 550 ml. water. Simmer over low heat until the granules dissolve, then turn off the burner and cool the composition.
Pour in cherry syrup, leave for 5 hours. During this period, the berries are saturated, the jam will become sweet and sour. After the specified time, send the container to the fire, cook in one step for half an hour.
Rinse the container and pour boiling water over it, do the same with the lid. While the container is hot, pour the treat, roll it with a key, flip it over. Cool the jam, turn to cold.

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