I'm sure I've seen someone use it in ice cream and in cake - you know, on one of those Masterchef type programmes. I'll try to find the details when I'm home from work.
You can dry it into a powder in a low oven and use that as a fertiliser ingredient (blood meal, bone meal etc) or just pour it diluted onto the soil like MSD says; I hear this also has the bonus effect of warding off prey-type animals who smell it and worry your garden isn't safe, but I'm not sure how true that is. I bag and bin mine, because I have concerns about flies etc, and also close neighbours who I don't want to see me strolling around with a bucket o'blood or see a weirdly red-tinged patch of garden :/