The Cadbury's Shortcake, or are you talking about Astros? Either way, AGREED.
For me, I really miss Secret bars, Vice Versas, Fiendish Feet yoghurts, Frufoo yoghurts (and their chocolate UFO counterparts), 10p puffs (crisps), turkey twizzlers, and a WHOLE bunch of other amazing treats.
I also made a thread about chicken tom-toms (mini kievs with ketchup filling) as my most-missed, but I found Iceland's own-brand version of them! So no more tears, at least from that avenue!