Mix all the cereal, oats and sultanas in a bowl, crushing the cereal if required.

In a pan combine the butter, honey, sugar and vanilla essence

Cook until the butter melts and the sugar dissolves

Pour over the dry mixture and stir until it binds together.

Add half the chocolate chips, keeping some to add to the top of the bars

Press the mixture into a square baking tray lined with baking parchment

Sprinkle the rest of the chocolate chips on top

Leave to cool in the fridge for two hours

Cut into squares