In a heavy bottomed pan add milk and butter and heat.
When the butter melts, add the milk powder and whisk well to make a lump free mixture.
Add in the sugar and cardamom powder and mix well.
Sugar will start melting and the mixture will become slightly thin.
Keep on stirring on medium heat until the mixture thickens and doesnot stick to the pan.
Grease a small baking tray or a plate with butter and pour the thick mixture on it.
With the help of a spatula coated with butter, smoothen the mixture to even thickness.
Allow it to cool while you make the second layer.