Soak jaggery in warm water, crush it well. Then heat it up until it is slightly thick (no string consistency needs to be checked here).
Cool down, strain and keep aside.
Take rice flour and roast for few mins without changing the color, when smoke starts to come switch off and set aside to cool.
Take raw banana, first peel of the skin and chop them into bite size pieces.
Heat oil in a kadai and deep fry it until golden, the shh sound should stop. It will give tapping sound while it touches the sides of the kadai, that way you can make sure its fried well.
Drain in tissue paper and set aside.
Heat jaggery syrup in pan, meanwhile get jeera powder, dry ginger powder and cardamom powder.
Once the jaggery syrup nicely bubbles up and becomes thick like honey and starts to form single thread add the powders, mix well and then add fried chips and keep cooking until the syrup is absorbed well may be for 2-3mins then switch off.
Finally add roasted rice flour and keep mixing till it coats the chips.
Cool down, store Sharkara Upperi in airtight container and enjoy.