For a fun and whimsical birthday cake, try this Thermomix recipe for a caramel popcorn cake. The cake layers are flavored with caramel and filled with a luscious caramel buttercream. The cake is then covered in a caramel glaze and topped with a generous amount of caramel popcorn. This cake not only looks impressive but also has a delightful combination of flavors and textures. It's a perfect choice for a movie-themed birthday party or for kids who love the sweet and salty combination of caramel and popcorn.