The egg is a symbol that signifies fertility and the rebirth of life. That is, it has everything to do with Easter, since at that date Christians celebrate the resurrection of Jesus Christ. So the Chinese and other people exchanged colorful chicken eggs with beets and other pigments obtained from nature many centuries ago.
However, the idea of chocolate eggs arose in France, where cooks emptied chicken eggs, stuffed them with chocolate and painted the bark.
After this explanation watch this video and be ready to go to Brazil !!