I have been buying and cooking the 'deliciously free' brand of chocolate mud cake for my daughter for school lunchbox treats ( with hidden purred carrot and pumpkin of course!) for some time, because it is so tasty, and the whole family loves it... Looking at the label again now that I am looking through 'fructose free' eyes, and I note that it is less than 0.1g fructose per 100g. Yippee!!
The number 1 ingredient is sugar, so I'm not sure what they use to sweeten it, but for a packet cake that is nut free, wheat free, gluten free, and dairy free....and low in fructose. It is actually really nice.... And good for a special occasion.... I get it from the health food section in Coles, I think it's around the $5 mark