Rinse the blackberries thoroughly and let them drain.

Place the blackberries, sugar, vanilla sugar, and water in a saucepan.

Heat the mixture over medium heat, stirring regularly, until the sugar is dissolved. When the mixture begins to boil, reduce the heat and let it simmer for about 15 minutes, or until the jam starts to thicken. The jam should have a nice, even consistency.

Pour the jam into sterilized jars while it's still hot. Alternatively, you can use preservative (Atamon) for longer shelf life. Fill the jar completely and seal it tightly.

Once the jar has cooled, store it in a dark and cool place, and it should be used within a couple of weeks.

Now you have homemade blackberry jam, perfect for breakfast, pancakes, or as a filling in baked goods!