Tips Are there strands of egg in your curd? Then the heat was too high. One way to prevent this is to prepare the blackberry curd in a double boiler, like I do with lemon curd. I haven't tried it myself, but it should work just as well. It does take a bit longer.
How to store Unopened jars of blackberry curd can be stored in a cool, dark place for up to a year. Once opened, store it in the refrigerator, where it will keep for 1-2 weeks.