The answer is yes, tres leches cake is typically pasteurized. Pasteurization is a process of heating milk to a specific temperature and then cooling it quickly in order to kill pathogenic bacteria while preserving the nutritional value and flavor of the milk. This process helps make tres leches cake safe for consumption by destroying any potential harmful bacteria, reducing spoilage risks, and increasing shelf life. Tres leches cakes are usually made with whole or low-fat pasteurized milk as well other dairy ingredients such as cream cheese or sweetened condensed milk that have also gone through pasteurization.