I like when food is not always too traditional on Christmas day. It still needs to be indulgent though because it is Christmas after all! The traditional Christmas dessert in France is la bûche de Noël (Christmas log). You would usually get one with chocolate, coffee or chestnut butter cream. Last year, I made mine with lemon and white chocolate. Back at home in France, my mother would sometimes vary it by getting a frozen Christmas log: nougat ice cream and raspberry coulis, oh my!
Three years ago, while I still lived in Australia, I served my guests on Christmas day a plate of delicious profiteroles with a hot dark chocolate sauce. They really loved it. It was rich and indulgent as it should be!