In 1/4 cup milk add custard powder and mix well to form a thick paste, set aside.
Boil milk, add sugar. Mix well till sugar completely dissolves.
Now add custard powder mixture mix well till it thickens.
Keep stirring continuously in low flame to avoid lumps.
At one stage the custard will be thick but in pourable consistency more like our dosa batter, at this stage switch off.
Cool down completely then add fresh cream, whisk it well.
Pour it into a freezer safe bowl and freeze it for 2-3 hrs.
Then scoop out and blend it in a mixer. Blend it until smooth.
Then freeze it again for 2 hours then blend again, do this at least for 4-5 times in total.
Finally freeze it for at least 6-8 hrs.
Once taken from the freezer it will look very hard, leave it aside for 5-10mins, then scoop out.
Serve Custard Ice Cream immediately.