In a pan, boil 2 cup water. Add 2 tbsp water to the ragi powder and make a paste.Add this to boiling water.Add salt and mix well, cook for 8-10 min stirring continuously .Make sure ragi is cooked properly and then add powdered jaggery and mix well. You can see the liquid thicken a bit when it’s cooked. Switch off the flame.Cool a bit, when it’s still warm add Nutella and mix well.Add coffee decoction to it and mix.