Mix cornstarch and cocoa powder in 5 tbsp milk until lump free

Add cocoa paste to remaining milk and heat over low medium heat. Add sugar and whisk well

Continue cooking over low medium heat until it starts thickening. Switch off. Immediately add melted dark chocolate to mixture and mix until well combined. You can melt dark chocolate either by microwave or double boiler method

Pour the mixture into heat resistant bowl and allow to cool completely

Pour in serving bowls. Refrigerate for 2 hours atleast before serving. Enjoy the decadent Rich pudding.Serve cold