"Add corn flour, nutella and ½ cup warm milk in a pan and mix it well. Make sure there are no lumps.Add remaining milk, sugar and cook it on low flame for few minutes.Keep stirring and cook for 4-5 minutes or until the sauce thickens.Cook and stir until the mixture thickens enough to coat the back of the spoon. Remove from the flame and let it cool down a bit.Pour it in serving bowls and let it cool down completely.You can serve it warm or refrigerate to serve it cold.You can top it with nuts of your choice or chocolate chips before serving."