Hey all, I have started making sponge cakes and using fondant icing however about 20 mins after I ice the cakes the icing start to sweat and go stickey.

Anybody have any ideas why this could be? I put a layer of buttercream between the sponge and fondant should I leave this to dry? or take it out? Is the room I'm putting the cake in to hot? any help would be great.

Thanks

Are the cakes frozen or being kept in the fridge? If frozen then they could still be partially frozen causing condensation on the frosting. Same thing with the fridge. I don't refrigerate until my cakes are completely decorated.

No all the cakes are kept at room temp

Depending on where you live, a fondant cake that has been in the fridge may sweat. It's usually warm where I live, so taking a fondant cake from the cool fridge to the warm air causes it to sweat, and condensation forms on the outside of the cake, making it shiny. This will happen if your cake is cool before you cover it in fondant as well.

The condensation will eventually evaporate, but it takes a few hours. I don't put my fondant cakes in the fridge anymore UNLESS they have perishable fillings.

I was told that you can sometimes prevent sweating by placing your cake in a box, and then place the box in a trash bag, closing it tight. When you take it from the fridge, let the cake come to room temp before taking it out of the bag and box. That might prevent the sweating, but I haven't tried it yet, so I can't guarantee it!

How long after baking the cakes are you decorating them? I usually leave them overnight to cool completely and settle.

I also would give the buttercream time to stiffen and settle before applying the fondant, otherwise the fondant may start to slide.