Place a large pot on the stove. Set to low heat.
After a couple minutes, add enough oil to deep fry the gulab jamoon (should be over 3 inches of oil from the base of the pot).
Add one gulab jamoon to test the oil, rotate to ensure even cooking until golden brown. Remove the test sweet from the oil and allow to drain and cool for a few seconds. Break apart. If the center has air pockets all the way through, the oil is ready for frying. If it is not completely cooked, leave the oil for a couple more minutes to heat up. If the gulab jamoon is very dark on the outside but uncooked on the inside, reduce the heat.
When the oil is ready for frying, carefully add enough gulab jamoon to the pot, without overcrowding it.
Turn frequently to ensure even cooking.
After 10 minutes or so, remove from the oil with a slotted spoon.
Place on paper towels to absorb the excess oil.
Leave to cool.
Repeat until all the gulab jamoon have been fried.