Éclair vs Mississippi Mud Pie

Both desserts rely on whipped cream, butter and chocolate, yet they use them in very different ways. The éclair starts with a baked choux dough enriched with butter and four eggs, piped and puffed until golden and firm, then filled with vanilla-scented whipped cream and dipped in warm dark chocolate melted with butter. Mississippi mud pie presses crushed chocolate sandwich cookies and butter into a crust beneath a baked cocoa filling with a hint of coffee, set but slightly jiggly, and finishes with a layer of whipped cream. Where the éclair contrasts puffed pastry with a creamy filling, the pie stacks cookie, cocoa and cream into one chilled slice.