Beat yolks and icing sugar til fluffy, set aside
Beat butter til creamy, pour in condensed milk while keep beating until well mixed, set aside
Beat egg whites til fluffy, set aside
Combine flour, spice, and cornstarch
Fold yolks and egg whites, add in dry mixture, stir to combine well
Divide the batter, add differ food colors, pour one after another and sprinkle with chocolate rice/chocolate granules, grill with upper fire until browning slightly for each layer