Place the custard powder, milk and sugar in a saucepan and stir well until the flour is dissolved well. Turn the heat to medium, stir the mixture continuously until the custard begins to thicken. Making sure there are no lumps formed. Once thickened, turn off the heat and allow the custard to cool and keep aside.

After couple of hours when custard and jelly are settled remove jelly from the pot and place on custard.
Garnish with cake slices, dust some cake on top.
Serve chilled.