☞ TESTER TIP: Tradition holds that the stout goes into the glass first. This technique creates a rather dramatic presentation given that the Champagne, due to the difference in densities, lingers atop the stout in an impressive, if ephemeral, subsequent layer. It’s only a matter of time until the boozes mingle. To extend the lifetime of the layers, pour the Champagne over the back of a spoon to prevent it from plunging headlong into the stout.