I'm relatively new at this and have a request for a chocolate filling that is neither too sweet, nor too chocolatey. I've actually never had anyone ask for chocolate "but not too much", so I'm at a bit of a loss for what to use. My first thought was mousse, but I'm worried about it holding up under fondant and in our summer temps. Then I thought whipped ganache, but I'm thinking that might be too rich for my customer's taste. I know you guys can help me to find the...