This grownup chocolate cake is flavored with Earl Grey tea. I love the way the citrusy aroma, which comes from bergamot orange, pairs with chocolate. Although I am very fond of this combination, I think of the cream filling, the cake, and the frosting as separates and use them along with other fillings, cakes, and frostings in various combos defined by the occasion — so don’t hesitate to mix and match. Be aware that the Earl Grey cream, like most cream fillings, must be chilled thoroughly before you can whip it.