Children: Weigh out the ingredients. Older children can do this by themselves with supervision and little ones can help to pour or spoon ingredients into the weighing scales. Put the butter, chocolate and golden syrup in a saucepan or microwavable bowl. Put the cornflakes in another large bowl.
Grown ups: Melt the butter, chocolate and golden syrup in the saucepan over a low heat or briefly in the microwave. Allow to cool a little before pouring over the cornflakes.
Children: Stir the ingredients together gently using a wooden spoon. Spoon the mixture into 12 cupcake cases arranged on a muffin tray (or baking sheet, if you don’t have one). Grown ups will need to do this for younger children or simply arrange on a tray and let the mess happen. Put in the fridge to set.