Prepare the Pudding BaseIn a large saucepan, pour the milk and place it over medium heat. Add the vanilla sugar and stir gently until it dissolves completely. The vanilla sugar gives the milk that classic, aromatic flavor that forms the heart of this dessert.

Add the Condensed MilkSlowly pour in the condensed milk while stirring continuously. This not only sweetens the mixture but also deepens its creaminess, ensuring the pudding has a rich, luxurious mouthfeel.

Mix the CornstarchIn a separate bowl, combine the cornstarch with a small amount of cold milk (about half a cup) and stir until completely smooth. This step ensures there are no lumps when you add it to the hot milk later.

Thicken the PuddingOnce the milk mixture on the stove begins to steam, gradually pour in the cornstarch mixture while whisking constantly. Continue stirring over medium heat until the pudding thickens to a smooth, glossy consistency—this usually takes about 5–7 minutes. Be patient; it’s worth it!

Add Butter and FinishRemove the saucepan from heat and stir in the butter. The butter gives the pudding its silky finish and adds a hint of richness. Pour the hot pudding into serving glasses or bowls and let it cool at room temperature for 10–15 minutes before transferring to the refrigerator to chill completely, at least 2 hours.

Prepare the Berry SyrupIn a small saucepan, combine the frozen berries and sugar. Cook over medium heat until the berries release their juices and the mixture starts to thicken into a syrup—about 8–10 minutes. Stir occasionally and mash some of the berries to enhance the flavor. Once done, remove from heat and let it cool slightly.

Assemble and ServeOnce the pudding is set and chilled, spoon the berry syrup over the top. The contrast between the creamy vanilla layer and the bright, tangy berry topping creates a beautiful dessert that’s as lovely to look at as it is to eat. Serve immediately or keep refrigerated until ready to enjoy.