A Marmorkuchen (German Marble cake) usually satisfies everyone at the table: those who like chocolate AND those who like vanilla. Vanilla cake batter swirled with chocolate cake batter, resulting in a pretty “marbled” appearance. This German marble cake recipe with Eierlikör ramps up the flavor by adding your Oma’s favorite (and quite tasty) Eierlikör, which is mixed into both batters…