Disco 70's cake 40th Birthday - Thanks for the great disco cakes on cake central! This particular design was what the Birthday Girl chose. I know I can't compare with the original designer of this cake but I did my best! It took way longer than I imagined with all those squares! The cakes are white chocolate (top) and red velvet (bottom). The disco ball is half rice krispy and half cake. Thank you Sugar Siren for this idea.