Steps
- Put 4 cups of frozen cloudberries and ¾ cup of sugar in a medium saucepan. Bring slowly to a gentle simmer over low to medium-low heat.
- Cook for about 30 minutes, stirring often, until the berries are fully softened and most liquid has evaporated. The jam should be thick but spoonable.
- Transfer to clean jars, cool, and refrigerate.