This orange marble cake is a refreshing and citrusy twist on the classic recipe. It's made with all-purpose flour, baking powder, salt, unsalted butter, granulated sugar, eggs, vanilla extract, milk, orange zest, and cocoa powder. The cake is moist, tender, and has a beautiful swirl pattern. It's perfect for spring or summer and can be served as a dessert or with a cup of tea or coffee.
