I make this as a treat for my father-in-law, and the kids absolutely love it too. If you're looking for something healthy & sugar-free, then I would look away now because this is probably the furthest thing from healthy that you can get. But, frankly, I care not!
2 x packs of four 36.5g Mars Bars
2 generous tbsp golden syrup
Rice Krispies (or supermarket equivalent works just as well)
4 x 45g bars dark chocolate (Bournville is my personal favourite!)
Line a shallow brownie pan with greaseproof paper or cling film and set to one side.
In a bowl, pour in a generous amount of rice krispies (I never measure, I just guess judging by the size of the pan I intend to use, you can always add more if needed).
Cut up your Mars Bars and place them in a microwave-safe bowl, and melt them in short blasts, stirring regularly, to make sure they don't burn. It takes about a minute in my 800W microwave, in 15-20 second bursts.
Pour the melted Mars Bars in with the rice krispies, add the golden syrup and mix well until completely combined. Use a wooden spoon or - if all else fails - your hands, to get it properly mixed in. Then put it into your brownie pan and squash it down into the pan.
Melt your dark chocolate in the same manner as you did the Mars Bars, or in a bowl over a pan of water on the hob, until they are completely melted into a glossy liquid, then pour it over your Mars mixture in the pan. Use a spoon and spread it evenly over the top.
Place it in the fridge and leave to chill for a couple of hours. Then simply cut up, share and enjoy. Or just enjoy, you don't have to share it!
You could also cut it up into squares and present it in a nice gift box as an end-of-term home-made teacher present perhaps, along with some delicious cranberry & white chocolate fudge, or rocky road.
Or, like I said - you could just eat it all yourself... No judgement from me!