About this recipe: A basic chocolate concrete (or crunch as you may know it). Very easy to make with only 4 ingredients. Makes a nice dessert in winter that kids absolutely love. It's my siblings' favourite. I use a 23cm sandwich tin, you can use almost anything really. Plus it is a really cheap dessert.
Only leave it to 'rest' if you want it hard. Some people like it still soft. It depends on your own taste.