Homemade pomegranate molasses is very simple to make. Tip: take care not to reduce the syrup too much. It should be slightly thickened, coating the back of a spoon.
Pour the juice into a large, heavy saucepan. Bring to a boil over medium high heat. After it begins to boil, reduce it to low heat. Stir occasionally to prevent sticking.
Reduce the heat to medium low and allow it to simmer, stirring occasionally until the juice is reduced significantly, to about 3/4 cup, and the molasses coats the back of a spoon.
Cool completely, then store in an airtight container, such as a jar, in the refrigerator.