This was the first time that I've made this recipe so no ...have not tried it with blackberries. If you do make it let me know what you think because our blackberries will be ripening soon and I'll need ideas.

I do have one recipe bookmarked for blackberries that looks really tempting. I think I'll give it a try this year. It might be a perfect way to use your sour blackberries. https://www.freshpreserving.com/blackberries-in-framboise---ball-recipes-br1253.html