Any good cake/sweet recipes for egg/dairy/milk allergy child?

[agoodbook]

Hi, just asking for advise- helping DD with DGS' birthday party - one of the littlies is egg/milk/dairy intolerant. We have covered most of the savoury stuff, but would love a couple of sweet things . Can I use cocoa powder for chocolate rice crisps? anything similar that anyone can recommend?

The big bags of marshmallows are not normally made from egg. My kids are very allergic to egg.