To prepare the zebra cake, place the butter into chunks, sugar (1), and the vanilla bean seeds (2) in a bowl. Beat with an electric mixer (3) to combine. Now add the eggs (4) and continue beating with ...

Preheat oven to 350°. Line an 18" x 13" baking sheet with parchment and grease with cooking spray. In a large bowl, prepare cake mix according to box directions. Spread batter into an even layer on ...