Right, I managed to find an old recipe I was given a few years ago over the weekend too. But I seemed to remember that it was very hard (very much concrete!). The ones I had at school were crisp on the outside, but quite gooey in the centre. So I combined the two recipes
Ingredients
300g margarine (melted)
300g granulated sugar
50g cocoa powder
300g self raising flour
100g plain flour
2 eggs (beaten)
1 tbsp vanilla essence (optional)
Extra granulated sugar for topping
Preheat the oven to GM3
Grease tin and set aside.
Mix all the dry ingredients in a mixing bowl.
Add melted margarine and vanilla essence (if using) until mixture resembles a paste.
Add beaten eggs and mix again.
Place in well greaased 1 inch baking tray, and spread out to equal density throughout mixture.
Slightly score top of mixture with back of fork, sprinkle top with cold water and sprinkle over the extra sugar.
Bake on shelf about half way in oven for about an 60-75mins. For best results, check after 45mins.
When cooked, cut into shape whilst still warm.
Enjoy!
Note: I baked mines just below the middle of the oven for an hour and it was still slightly gooey and possibly undercooked in the centre. However, there were no complaints from my family
Also, I used a tin that was 12x10 and just patted out the mixture to fill the tin.