Looks deliciou! This does seem to be a very good year for blackberries. My garden was full of them, but I love them so much I just ate the all on the spot! I made jam a few years ago, from blackberries, rosehips, haw berries and rowan berries. I needed a LOT of sugar as those berries are pretty tart. There was enough jam to make a few Xmas presents.
All those mixed up? What was the taste like..?
It had a really unusual fragrant taste. It was very nice but more like jelly than jam, because I put too much lemon juice in.