My Mum used to make this recipe quite often when I was a kid, and I have been craving it recently.
She told me that it was copied from a magazine, and if I was young at the time, it would have been around 1975 - 1980. We lived in the UK at then.
The recipe was very much like a shortbread base (but wasn't shortbread), and had thinly sliced apples in a spice mix (like cinnamon, mixed spice, brown sugar etc) on the top. They used to get chewy when they baked, and the whole thing was incredibly moreish.
I know this is a HUGE longshot, but does anyone else remember this snack?