Hi just want to know if marshmallows are bad fo...

Hi just want to know if marshmallows are bad for children/babies apart from the obvious sugar content are the easily choked on or whatever?? I had never given my 18month old them before cos i thought I had heard they don't dissolve properly in their throat etc..etc but my mil told me she had given them to her today when she was looking after her said she loooved them - well im sure she did but are they a risk factor??