Thanks for the idea, am going to try it! X

Glycerine is liquid, so I think maybe vegetable oil, which is a fat and will add moistness, might be a good substitute. But hopefully someone who is more experienced with gluten free cooking has some more ideas. Good luck!

It's part of the gluten free cake mix, guess to keep it together. Would cornflour work?

hmmm...is it for the batter, or the icing?