My mum used to make Puff Candy ice-cream. She used to send us to one of the local Italian ice-cream shops and buy a huge bowl of their home-made vanilla ice-cream. She used to wait until it had softened a little and then crumble puff candy into it. It was wonderful with the hard pieces of puff-candy and the meltingly delicious ice-cream.
I think it's also known as cinder toffee.