In a pot, add milk and condensed milk, whisk and brink to a boil.

Keep stirring the milk till reduce a little.

Keep whisking the mixture till thick, remove and allow to cool a little

In food processor, blend biscuit and butter till become like breadcrumbs

In a dessert cup pour the crushed biscuit then top with the milk tart mixture then again with the biscuit and finally with the milk tart. Sprinkle some cinnamon sugar to cover top, place in fridge for some hours before serving