SquareMagenta Square Cake Layers – Vanilla Butter recipe. 20cmx20cmx3cm / 8″x8″x1,3″ by 3 layers May 18, 2022 / Save as PDF Quantity per student: 2 chilled and flat layers. Not allowed: Oil based cakes. Or sponge cakes. The cake used must be dense. Butter based like Pound Cake.