Put sugar & syrup into a saucepan on a low heat. Let it all melt until you don't see the sugar anymore, this will take a while

Increase the heat and let it boil and bubble. Shouldn't take too long and wait for it to become an amber brown colour

Now this step you need to do quite quickly. Once happy with colour, you need to take off the heat, add the bicarbonate of soda and mix with a wooden spoon straight away until it's mixed in fully. It will start to turn more mustardy in colour and bubbles will form.

Pour carefully into a baking tray lined with baking paper and let it cool for about 30-40mins. Hit it with the end of a rolling pin or just break it up into shards

Melt the chocolate however you like and coat the shards. Sprinkle the pistachios on top before then harden. Delicious