Salted spiced choc-caramel slice

Yesterday I made some of this yummy slice with some help from Rosie. I found it in the Better Homes and Gardens magazine from last Easter and had tried some made by someone else back then. The short story - it turned out very well and was delicious.
I've made regular caramel slice lots of times before, but only once has it really turned out how it should. Often the base falls off or the caramel is too runny and the slice doesn't hold together. But this recipe was no more work and turned out to be a perfect gift to share with friends :-). And the spice and salt added some extra interest!