Bring khoya to room temperature. Crumble with hands and add to a large bowl. Add maida, cooking soda and mix well.
Add water, a teaspoon at a time and make a smooth dough without cracks. Don't knead the dough too much.
Make small equal sized balls. Make sure its smooth and does not have any cracks. Keep the balls covered.
To make sugar syrup, add sugar, water, cardamom, rose essence, saffron in a sauce pan and mix well.
Once the sugar dissolves completely, bring to boil and then simmer for 8-10 minutes. Remove from heat and set aside.
Heat oil for deep frying. Once the oil is hot, turn down the heat to low. Add the jamuns and keep turning them to ensure even cooking.
Fry until they turn dark golden brown. Drain on a kitchen towel and immediately add them to the warm syrup. Let it sit for 3-4 hours.