Step 1

Mash the black currants and cranberries using a wooden pestle (rolling pin end), alternatively put them through a food processor and gently pulse until they are chopped up.

Step 2

Place the fruit pulp into a cheesecloth and squeeze until the juice is removed from the pulp. Set the pure juice aside.

Step 3

Put the fruit pulp from the cheesecloth into a saucepan. Add the water and bring to a boil and allow to simmer for about 8 minutes. Remove from heat and allow to cool. Strain the juice through the cheesecloth one last time. Discard the fruit pulp.

Step 4

Add the previously squeezed pure juice to the cooled juice mixture. Sweeten with sugar to taste.