This red velvet marble cake is a stunning and delicious version of the classic recipe. It's made with all-purpose flour, baking powder, salt, unsalted butter, granulated sugar, eggs, vanilla extract, milk, cocoa powder, and red food coloring. The cake is moist, tender, and has a beautiful swirl pattern. It's perfect for Valentine's Day or any special occasion and can be served as a dessert or with a cup of coffee or tea.