Prinzregententorte (Bavarian Layer Cake) vs Éclair

Both desserts finish with a dark chocolate glaze, but they use their shared ingredients in very different ways. The Prinzregententorte stacks eight thin cocoa sponge layers with a rich buttercream made by beating a cooked vanilla pudding into creamed butter, adds a thin brush of apricot jam, and seals everything under chocolate melted with cream for a dense, chilled slice. The éclair instead beats eggs into a piped choux dough baked until puffed and golden, fills it with light vanilla whipped cream, and dips it in chocolate melted with butter.