I tried a test today to see how long a mini mousse cake would hold up on the counter in my 83 degree kitchen (or on the table at the wedding).
Imagine the dessert table beautifully decorated with trays of mini mousse cakes when the meal begins... 30 minutes later.
After the test we decided to put the mousses on trays and pass them to the guests direct from the refrigerator rather than set them out on the table.
The good news is the summer coating is working for the piped decoration. It's sliding off the mousse cake, but it's intact.