Tres leches cake, meaning «three milks» in Spanish, is one of Latin America's most beloved desserts, especially popular in Mexico and Nicaragua, where the two countries dispute its origin. The recipe's spread is often linked to marketing campaigns by condensed and evaporated milk companies in the mid-20th century, which printed the recipe on their product labels, helping it spread quickly into home kitchens.

The core idea is soaking a very light sponge cake in a mixture of three types of milk: sweetened condensed milk, evaporated milk, and heavy cream or whole milk. The cake slowly absorbs this mixture until it becomes completely moist inside without falling apart, and it is topped with a layer of light whipped cream that balances the sweetness of the condensed milk.