What is dulce de leche? Argentina's beloved caramel explained

Dulce de leche is the sweet at the centre of Argentinian dessert culture. Slowly caramelised milk, thick as peanut butter, deeply toasty, spooned onto everything from toast to ice cream to the biscuit sandwiches called alfajores. Here is what it actually is and how to get hold of it in Sydney.

How dulce de leche is made

Try it at home

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The basic recipe is comically simple. Whole milk, sugar, a pinch of bicarbonate of soda (which keeps the colour bright), sometimes a vanilla pod. Cook on very low heat, stirring often, for 90 minutes to 2 hours until the mixture is thick, glossy and a deep golden brown.

The transformation is chemical, not just visual. The Maillard reaction (proteins and sugars reacting under heat) produces hundreds of new flavour compounds. It is the same reaction that browns bread crust and caramelises onions. That is why dulce de leche tastes toasty and complex, not simply sweet.

The three main styles

Dulce de leche vs caramel: not the same

Caramel is what you get when you cook sugar (dry or wet) until it browns. It is sugar and water, sometimes butter and cream added later. The base flavour is sugar based.

Dulce de leche is what you get when you cook milk with sugar until the milk sugars (lactose) and proteins brown together. The base flavour is milk based. Toastier, less sharp, more complex on the finish.

The practical difference: caramel is thinner, glassier, more acidic. Dulce de leche is thicker, more matte, more nutty. You can drizzle caramel over ice cream and spread dulce de leche on toast. Interchangeable in some recipes, distinct in the mouth.

The contested origin

Argentina claims dulce de leche as a national dish. The most popular origin story dates to 1829 in Cañuelas, Buenos Aires Province, where an aide to General Juan Manuel de Rosas allegedly forgot a pot of milk and sugar on the stove and returned to find it caramelised.

The story is charming but almost certainly folkloric. Milk based caramels appear across Latin America under different names.

• Uruguay. Dulce de leche, essentially identical to the Argentinian version. Uruguayans dispute the Argentinian origin claim vigorously.
• Chile. Manjar. Same technique, sometimes cooked longer for a darker colour.
• Mexico. Cajeta, traditionally made with goat's milk (leche de cabra), giving a distinctive tang.
• Colombia. Arequipe. Common as a spread and dessert filling.
• Brazil. Doce de leite. Widely used in cakes and pastel de nata style desserts.
• Philippines. Yema. A firmer, thicker version influenced by Spanish colonisation.

The honest position: some form of slow cooked milk caramel probably emerged independently across Latin America and the Iberian world during the colonial period. Argentina is where it became a national obsession and where the modern industrial production is centred, but Uruguay has an equally legitimate cultural claim, and Colombia, Chile and Mexico have their own valid variants.

How Argentinians eat it

Dulce de leche is not a special occasion food in Argentina. It is a pantry staple.

• Spread on toast for breakfast (with butter underneath).
• Filling for alfajores, the national biscuit sandwich. See our alfajores guide.
• Layer in chocotorta (Argentinian chocolate biscuit cake).
• Topping for flan, panqueques, arroz con leche.
• Filling for churros.
• Dip for apples or bananas.
• Straight off a spoon at 11pm with the fridge door open.

For 12 more specific uses, see our dulce de leche recipe ideas.

Where to buy dulce de leche in Sydney

Availability has improved over the last five years. Look for:

• La Serenisima (Argentinian import). The gold standard. Sold in some Latin delis (Fiesta Grocer Fairfield, Casa Iberica Alexandria). Around $12 to $16 per jar.
• Chimbote (Argentinian). Widely stocked in Latin delis. Similar quality, similar price.
• San Ignacio (Argentinian). Available online through Latin importers.
• Coles and Woolworths. Occasionally carry Nestle's dulce de leche under the La Lechera brand, or a Coles home brand version. Serviceable, not authentic.
• Homemade. The condensed milk trick (below) gives excellent results with almost no effort.

How to make dulce de leche at home

Method 1: the condensed milk hack (easiest)

1. Take a sealed tin of sweetened condensed milk. Do not open it.
2. Place the tin in a large pot. Cover with water by at least 5cm.
3. Bring to a low simmer.
4. Simmer for 3 hours for standard consistency. 4 hours for darker and firmer.
5. Top up water as it evaporates. The tin must stay submerged. This is a genuine safety point (an exposed tin can explode).
6. Remove tin with tongs. Cool completely before opening.

Slow cooker version: same idea, submerge the tin in the slow cooker on low for 8 to 10 hours. Set and forget.

Method 2: from scratch

1. 1 litre whole milk, 300g sugar, quarter teaspoon bicarbonate of soda, half a vanilla pod.
2. Combine in a heavy pot. Bring to a bare simmer, stirring often.
3. Cook 90 minutes to 2 hours on very low heat. Stir every few minutes to prevent scorching.
4. The mixture is done when it coats the back of a wooden spoon heavily and has a rich amber colour.
5. Cool. Transfer to a sterilised jar. Keeps 3 weeks refrigerated.

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