In a small pan add whole milk and butter, cook until come to a boiling point. In a bowl take 2 tbsp milk powder and 1 tbsp of powdered sugar and warm whole milk mixture to make a soft dough, stirring with a spoon.
In another bowl add mashed sweet potato, semolina, all purpose flour and 1 tbsp of sugar, mix it very well. Keep aside for 10 minutes.
In a big pan add 2 cups of sugar and 2 cups of water. Boil until sugar dissolves. Add cardamom powder and kewra water. Then switch of the flame and keep it on gas stove to keep sugar syrup warm.
In a deep frying pan heat vegetable oil.
From mixture of mashed potato make small balls then press with your hands on the middle of the ball to make a cavity. Put one mawa ball on it. Then cover it up and make a ball again.
Deep fry potato balls in heated oil, until light brown. Drain it in a paper towel then dip it in sugar syrup.
Dip it in sugar syrup for 3 - 4 hours then serve. Sweet and delicious Pantua (potato sweets) is ready to serve.