Rice Krispie Squares Gooey Marshmallow

Kellogg's puffed rice cereal 35.0% , rice flour 16.1% , sugar 8.1% , barley malt extract 5.0% , wheat gluten 3.4% , salt 2.5% , E375 1.9% , iron 1.5% , vitamin B6 1.3% , E101 1.0% , thiamin 0.9% , folic acid 0.8% , vitamins 0.7% , vitamin D 0.6% , vitamin B12 0.5% , marshmallow 33.0% , fructose 0.4% , palm oil 0.4% , invert sugar syrup 0.4% , glucose syrup 0.3% , E422 0.3% , flavouring 0.3% , E472e 0.3% , E472a 0.2% , E320 0.2% , caramelised sugar 0.2%