In a small bowl, combine custard powder with ¼cup of milk. Whisk well and set aside.
Combine rest of the milk and sugar in a saucepan. Bring to a boil.
Once the milk comes to a boil, remove from heat and slowly add the custard powder mixture whisking continuously. Bring the mixture to a simmer whisking continuously until the mixture thickens, about 2-3 minutes. Finally add the mango puree and ground cardamom, mix well and cook till mango puree is heated through, about 2~3 minutes.
Remove from heat and let the mixture cool completely and chill it before serving.
Serve topped with fruit and enjoy!!