Dulce de Leche: The Popular Latin American Treat and How to Make It

Dulce de leche, a beloved staple across South America, particularly in Argentina and Uruguay, is a testament to the magic of slow cooking. This iconic Latin American classic is crafted by simmering milk and sugar with a touch of baking soda over very low heat for hours. The process evaporates the water content, leaving behind a rich, velvety, caramel-colored sauce.

While its appearance might resemble familiar caramel sauce, dulce de leche's creation relies on a different chemical process. Traditional caramel is made by directly melting and burning sugar (caramelization). Dulce de leche, however, derives its distinct flavor and deep color from the Maillard reaction – a complex interaction between milk proteins and sugar amino acids when exposed to heat.

The recipe calls for 1 liter of whole milk, approximately 250 grams of sugar, 1 teaspoon of baking soda, and optional vanilla. The milk and sugar are heated until the sugar dissolves, then brought to a boil before the baking soda is added, causing the mixture to foam. After stirring to calm the foam, the mixture is simmered on the lowest heat for about 1.5 to 2 hours. Constant stirring is crucial, especially in the final stages, to prevent sticking and burning. The sauce is ready when it thickens to a consistency similar to boza or a fluid pudding, knowing it will solidify further upon cooling.