For babies younger than one year, cook the porridge in water, and then add breast milk or formula after it is cooked.
After adding jaggery, don’t cook the porridge for more than half a minute as it’ll cause milk to curdle. It’s best to turn off heat and then add jaggery. You can use powdered jaggery as it dissolves fast.
If you haven’t introduced cinnamon in your baby’s diet, please check with his/her pediatrician before doing the same. You might find this link about introducing spices in your baby’s food useful.