Help! I think I ruined my ganache, is there any way to thicken it up?!
Answers:
That is a lot of extra cream. You might be able to let it get cold then whip it up and it might get as thick as you want it to. If not, yes you can add confectioners sugar to it and it will thicken but it will no longer be ganache. It will still taste really good, it will just be sweeter than normal. I would for sure try just whipping it first. I have done that lots of times if it was just a little bit thin.
I'm not sure how much this will help. If its still warm there is a chance it will still thicken, if its cooled down at room temperature stick it in the fridge for a while and see if that works. Alternatively you could add some confectioners sugar, it will turn into a slightly rich butter icing but if its not being used as a glaze it would be ok, either way its still going to taste fab! good luck :)
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can you melt more chocolate and beat it in?