Bird's milk is a type of custard/cream. You can find it in many candies, called Bird's Milk, sold within the Slavic markets. It is also common, within the Slavic tradition, to make Bird Milk Jello or Bird's Milk Cakes for holiday dinners.
This cake was inspired by a friend of mine on Facebook. It was a complete blast making it; and believe it or not, it was quite easy.
In a small pan, combine chocolate chips together with butter. Remove from heat once it's all dissolved. Set a side and let it cool to room temperature.
Remove the cake from the fridge. Carefully using a knife, go along all sides of the pan. Place the cake upside down, to remove it from the pan. Spread chocolate on the top of the cake. You can shake the tray of the cake to smoothen out the top of the cake. Decorate with fruits of your choice; berries would work best.