You'd think this was designed to keep the children happy, and while that's OK with me, it is the adults who seem to find this particuarly irresistible.
If I can find a tub of edible disco glitter in one of my cupboards, I sprinkle some on while the marshmallow is still sticky, but it has a certain pearly, luminescent appeal as it is.
It's also beautiful cut into squares, then each piece pierced with a white birthday cake candle, and arranged on a stand. Alternatively, you could turn this into more of a pickable pud, by cutting the slab into teeny-tiny squares so that people can pop one straight into their mouth.
Recipe posted by Nigella