ButtercreamFIntro, Butterflowers_intro, fuchsia_palette, palette_medium Round Cake Layers – Vanilla Butter recipe. 15cmx3cm / 6″x1.3″ by 5 layers February 28, 2022 / Save as PDF Quantity per student: 5 chilled and flat layers. Not allowed: Oil based cakes. Or sponge cakes. The cake used must be dense. Butter based like Pound Cake.