Dulce de leche (), caramelized milk, milk candy, or milk jam is a confection commonly made by heating sugar and milk over several hours. The substance takes on a spreadable, sauce-like consistency and derives its rich flavour and colour from non-enzymatic browning. It is typically used to top or fill other sweet foods.
In the Philippines, dulce de leche made with carabao (water buffalo) milk is called dulce gatas, and is a specialty of Negros Occidental province.
In French, it is called confiture de lait (milk jam). In France, it is traditional in the regions of Normandy and Savoy, where it is commonly served with fromage blanc or crêpes.
The same confectionery is also known as kajmak in Polish cuisine, named after Turkish kaymak, a kind of clotted cream. Kajmak is most commonly used for wafers or the mazurek pie traditionally eaten at Easter.
Argentine politician Rodolfo Terragno attributed its origin to India, relating it to the sweet dish Rabri, made of yogurt.
There are records of dolce de leite in Minas Gerais, Brazil from 1773.
There are customs reports of importation of manjar into Argentina in 1693 and 1712. Argentine historian Víctor Ego Ducrot says it originated in the Captaincy General of Chile and would have made its diffiusion into Argentina with Army of the Andes in 1817.
Swiss naturalist Johann Rudolph Rengger reports the consumption of dulce de leche in Paraguay in his trip from 1818 to 1825.
Since 1998, at the initiative of the Argentine Center for the Promotion of Dulce de Leche and Related Products, the International Dulce de Leche Day is celebrated every October .
In 2003, Argentina attempted to declare dulce de leche as an intangible cultural heritage but countries across South America and Central America objected due to its popularity all over the continent.
Other ingredients such as vanilla may be added for flavor. Much of the water in the milk evaporates and the mix thickens; the resulting dulce de leche is usually about a sixth of the volume of the milk used. The transformation that occurs in preparation is caused by a combination of two common non-enzymatic food browning reactions called caramelization and the Maillard reaction.
Another method of preparation, similar to Russian boiled condensed milk known as "varyonaya sgushchyonka" (Ukrainian "shushchene moloko"), involves using canned or boxed sweetened condensed milk and cooking it in a pressure cooker for 20 to 25 minutes for a light color and slightly soft consistency, or 40 to 45 minutes for a darker color and firmer consistency. If using condensed milk from a box, it should be wrapped in about 5 to 6 layers of aluminum foil to prevent it from bursting.
It is also possible to place the condensed milk in a glass jar and boil it in the pressure cooker. In this method, different ingredients can also be added to the sweetened condensed milk, such as shredded coconut or peanuts. However, certain precautions need to be taken, such as wrapping the jar with a kitchen towel and lining the pressure cooker with another kitchen towel so that the bottom of the jar does not touch the cooker (as contact may cause the glass to shatter). The cooking time is similar to the previous method (around 35 to 40 minutes)."Homemade dulce de leche with coconut and peanut paçoca" - Water should be added to the pressure cooker – enough to cover the cans, boxes, or jars of condensed milk. A small amount of vinegar can be added to the water in the pressure cooker to prevent it from becoming discolored at the bottom. In all cases, once ready, it is important to let the dulce de leche cool completely, which takes about 2 hours.
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