Mars Bar Bubble Slice
Chop the Mars bars up into bite sized pieces and then melt with the butter over a low heat. And I mean LOW. The caramel stuff in the mars bars doesn't melt as well as everything else but with some stirring the whole lot should go gluggy after a while.
Pour in the Rice Bubbles and stir through till it's all mixed together well.
Turn it out into a baking tray. One of those shallow ones is best or a square cake tin if you don't have one of those. Pack it down good and tight and make sure it's even.
Then stick it in the fridge until it goes hard and cut it up into whatever sized slices you feel like scoffing.
