As mentioned above, enamel baking trays and tins are great ... of sponge and bake multiple layers at once. The tray is made from commercial grade aluminium, which is a fantastic heat conductor ...

Equipment and preparation: for this recipe you will need a sugar thermometer and three baking trays. Preheat the oven to 180C/350F/Gas 4. Line three baking trays with baking parchment or silicon ...