What ingredients make up a classic hedgehog slice?

The main ingredients are chocolate, cocoa, biscuits (i.e. cookies), butter, sugar, vanilla extract, and eggs. Several optional ingredients can be added including nuts, cherries, and coconut. One of the interesting things about the hedgehog slice is it does not bake. The texture and flavor is like a fudge. It sounds wonderful, if not very rich in flavor.

https://www.katysfoodfinds.com/classic-hedgehog-slice/

https://www.lightscamera-bake.com/hedgehog-slice-2/#ingredients-needed