In a bowl, combine the contents of the jelly mix sachets.

In a saucepan, bring 500ml of water to a boil. Remove from heat and let cool for 1 minute.

Pour the boiled water into the bowl with the jelly mixture. Stir until the mixture is completely dissolved.

Transfer the jelly mixture to a flat bowl. Let it set at room temperature for approximately 45 minutes.

In a small bowl, whisk together ¾ cup milk and custard powder until smooth. Set aside.

In a saucepan, combine the remaining milk (approximately 1 ¼ cups) and sugar. Bring to a boil over medium heat.

Gradually pour the custard mixture into the boiling milk, whisking continuously to prevent lumps.

Cook for an additional 2 minutes, stirring constantly.

Remove from heat and transfer the custard to a bowl. Let it cool to room temperature.

Cut the jelly and vanilla cake into bite-sized cubes.

In a serving bowl, add a layer of cubed cake, jelly cubes and chopped orange.

Pour a layer of cooled custard over the top.

Drizzle orange marmalade over the custard.

Repeat the layers, cake cubes, jelly cubes, chopped orange and custard.

Garnish with a subtle swirl of marmalade, a slice of orange, and a few jelly cubes.

Repeat the assembly process for the remaining bowls.

Chill in the refrigerator before serving. Enjoy!