Reply #5: You want something that will be stable at room temperature [View All]

[Warpy]

and at variable humidity. I'd suggest a flourless chocolate cake, about the richest you can make, split into 2 layers with a layer of jam between them. Drizzle ganache over it and let it set. Garnish with the same fruit that was in the jam. (I hate raspberry, but that's what most people use)

You could also consider cheesecake. There is nothing more decadent than cheesecake except a "chocolate pizza," something I found decadent to the point of inedibility.

Then there's the fruit tart, something that's really easy if you use store bought puff pastry. Glaze it with a mixture of apricot jam and water cooked together to make a syrup. The decadence comes from the fact that nobody else ever thinks of doing one and never takes the time to arrange the fruit slices in a careful pattern.