A scoop of pale tan dulce de leche ice cream curling out of a metal loaf pan, glossy amber ribbons of dulce de leche running through it

Dulce de Leche Ice Cream, With a Ribbon That Stays Soft

Of all the ice creams worth making at home, this is close to the easiest, because the hard part was done before anyone opened the jar. Dulce de leche is milk and sugar cooked down slowly until the milk itself turns brown. It arrives already carrying the sweetener, a good share of the milk solids and the flavor. The base here is that plus fresh milk and cream. There are no eggs to temper and no sugar to measure.

What the cook does control is quantity. Too little dulce de leche and the ice cream tastes of sweet cream with a rumor of caramel. Too much, and it stays soft in the freezer and can turn faintly sandy on the tongue in storage. The way out is to split the jar. Enough goes into the base to flavor it properly, and the rest is layered through the tub as a ribbon that stays glossy and soft at freezer temperature. The recipe takes about 550 g in all, whether from a jar such as San Ignacio (shop San Ignacio dulce de leche) or from a slow afternoon with the whole-milk dulce de leche recipe.

From the heladería to the supermarket pint

Argentines picked up ice cream the way they picked up ravioli, from the Italian immigration of the early twentieth century. Italian families opened the first heladerías in Buenos Aires. The city's tourism office names El Vesuvio, founded by the Cocitori family, as the first of them, and it served ice cream from 1902 until it closed in 2021. Dulce de leche now sits near the top of the country's list. In the 2023 flavor ranking published by AFADHYA, the association of Argentina's artisan ice cream makers, dulce de leche granizado comes second and plain dulce de leche fourth. Only chocolate with almonds ranks above granizado, and sambayón sits between the two.

The regulations even make room for it. The Mercosur standard for dulce de leche lets a maker label a product dulce de leche para heladería, dulce de leche for ice cream making. Rodrigo Stephani and his coauthors, in their review of how dulce de leche is manufactured, say the ice cream grade needs a pronounced flavor and intense color, and they recommend breaking down its lactose with enzymes during production. The reason for that also sets the limits in this recipe, and it comes up below.

Häagen-Dazs brought the flavor to American freezers by way of Argentina. According to a 2001 Wall Street Journal account, the company was getting ready to open scoop shops in Argentina in 1997 when a prospective franchisee pointed out that about 30 percent of the country's ice cream sales were dulce de leche. The company didn't make one. It launched the flavor in Argentina in 1998 and then sent it north, printing the word caramel under the Spanish name on the American carton so shoppers would know what they were buying. By 2000 the Seattle Times was reporting that it sold second only to vanilla at Häagen-Dazs.

The carton was close, not exact. Caramel is sugar pushed past the point where it breaks apart, and dulce de leche is milk browned slowly at a simmer. The complete caramel guide draws the line between them.

Why the jar gets split in two

Dairy scientists describe an ice cream base in percentages. Douglas Goff of the University of Guelph gives the usual ranges as 10 to 16 percent milk fat, 9 to 12 percent milk solids-not-fat (the protein, minerals and lactose in milk), 12 to 16 percent sweeteners, and water for most of the rest. Joseph Tobias, writing for Virginia Tech's extension service, put total solids no lower than 37 percent, because below that the body can be weak and the texture may turn icy in storage, and warned that above 42 percent the ice cream can seem heavy or soggy.

Dulce de leche fills two of those columns at once. The Mercosur standard caps its water at 30 percent, sets its fat between 6 and 9 percent and its protein at no less than 5, and most of what remains is sugar: the sucrose added at the start and the lactose that came in with the milk. Every spoonful raises sugar and milk solids together. You can't adjust one without moving the other.

Here is where 400 g of dulce de leche in 2 cups of whole milk and 1 1/2 cups of heavy cream lands, calculated from typical compositions. A given jar may move each figure by a point or so.

This base, approximately Typical range
Milk fat 14% 10 to 16% (Goff)
Sugars added (sucrose and glucose) 15% 12 to 16% (Goff); 14 to 16% for most palates (Tobias)
Milk solids-not-fat 11% 9 to 12% (Goff)
Total solids 40% 37 to 42% (Tobias)

Everything sits inside its range, and the milk solids sit near the top of theirs. That ceiling is lactose. It is the least soluble sugar in the tub, and as ice forms and the syrup around it grows more concentrated, too much lactose comes out of solution as crystals the tongue reads as grit. Tobias names that defect, sandiness, as the limit on how much milk solid a base can carry, and it's why Stephani's group recommends breaking down the lactose in the ice cream grade of dulce de leche. Another half cup of dulce de leche stirred into this base would push the milk solids to the very top of their range and the sugar and total solids past theirs. The extra sugar would soften it too, since dissolved sugars lower the freezing point.

So the surplus goes in as a ribbon. Layered rather than dissolved, it never becomes part of the base's arithmetic, and it stays soft for the same reason ice cream can be scooped at all. Goff notes that even at about 3°F (-16°C), only around 72 percent of the water in ice cream is frozen; the rest stays liquid as a concentrated sugar syrup. Dulce de leche made to the Mercosur standard is at least 70 percent solids, far more concentrated than the base, so while the ice cream around it sets firm, the ribbon should still bend under the spoon.

The same numbers explain the missing eggs. Goff credits milk solids-not-fat with body and a certain "chew resistance," and the jar already brings plenty. Yolks would pile more solids onto a base that doesn't need them.

Ingredients

For about 1 1/2 quarts, eight servings.

  • 400 g (about 1 1/4 cups) dulce de leche, for the base. Weighing is easier than wrestling it into a measuring cup.
  • 480 ml (2 cups) whole milk
  • 360 ml (1 1/2 cups) heavy cream, at least 36% fat
  • 1/8 teaspoon fine sea salt
  • 1 teaspoon vanilla extract or 1/2 teaspoon vanilla paste, optional, such as Heilala (shop Heilala vanilla paste). Taste the base first; San Ignacio's dulce de leche is already flavored with vanilla.
  • 150 g (about 1/2 cup) dulce de leche, for the ribbon
  • 1 to 2 tablespoons heavy cream, to loosen the ribbon
  • For granizado, optional: 60 g (2 oz) dark chocolate around 70% cacao, chopped

If your dulce de leche is homemade and feels even slightly grainy on the tongue, those grains are lactose crystals already, and they carry through into the ice cream. Warm it with a spoonful of milk and push it through a sieve before starting. San Ignacio's jar lists glucose alongside milk and sugar, and Stephani's group notes that glucose helps hold lactose crystals back, which is one reason a jar may be the steadier choice here.

The recipe also needs an ice cream machine of 1 1/2 quarts or more, with its bowl frozen as its maker directs, and a loaf pan or shallow container chilled in the freezer.

Method

  1. Dissolve the dulce de leche. Put the 400 g of dulce de leche and 1 cup of the milk in a saucepan over medium-low heat and whisk until the mixture is completely smooth and steaming, 4 to 6 minutes. Cold dulce de leche won't dissolve in cold milk; it breaks into soft lumps that stay lumps. Stop well short of a simmer. The point here is dissolving, and nothing needs cooking.
  2. Finish and cool the base. Off the heat, whisk in the rest of the milk, then the cream and the salt. The cold dairy brings the temperature down fast. Pour it through a fine sieve into a bowl to catch any undissolved bits or skin, then set the bowl in a larger bowl of ice water and stir for a few minutes until it's cool to the touch.
  3. Chill it properly. Cover and refrigerate for at least 4 hours, and overnight is better. Goff describes commercial mixes aged four hours at minimum and usually overnight, time for the fat to firm up and the proteins to hydrate, and Tobias warns that a mix warmer than about 40°F can freeze coarser. Stir in the vanilla, if using, just before churning.
  4. Churn to soft-serve and stop. Churn according to the machine's instructions, 20 to 30 minutes depending on the machine, until the ice cream is thick, pale and piling up around the dasher like soft-serve. In a commercial freezer, ice cream at this soft-serve stage has about half its water frozen, and hardening does much of the rest. Keep going past this point and the fat starts clumping into tiny flecks of butter. For granizado, the chocolate goes in during the last minute (see below).
  5. Loosen the ribbon. While the machine runs, stir the 150 g of dulce de leche with a tablespoon of cream, adding the second only if needed, until it falls from a spoon in a thick, slow ribbon. It should be at room temperature. Straight from the refrigerator it's too stiff to layer, and if it's warm it will melt channels through the ice cream and vanish.
  6. Layer, don't stir. Spread a third of the ice cream in the chilled pan. Spoon a third of the ribbon over it in lines, not one puddle. Repeat twice, finishing with ribbon. Drag a knife through once or twice at most; more and the ribbon blurs into the ice cream and you've just made the base sweeter. Press a sheet of parchment onto the surface.
  7. Harden, then temper. Freeze for at least 4 hours, until firm. Before serving, give it 5 to 10 minutes on the counter so it scoops in curls. Put it back promptly. Every warm-up and refreeze, which the industry calls heat shock, grows the ice crystals a little, so it is at its best in its first week or so.

Dulce de leche granizado

In an Argentine heladería the plain flavor has a sibling that ranks above it. Granizado comes from granizo, hail, and it means the ice cream is peppered with thin, irregular shards of chocolate. Italy makes the same thing under another name, and its birth is precisely dated. In 1961 Enrico Panattoni, at La Marianna in the upper town of Bergamo, poured melted chocolate into fior di latte as it churned; the cold set the chocolate and the paddle tore it into flakes. He named it stracciatella, after the Roman soup in which egg is stirred into hot broth and tears into rags. Bergamo's gelato makers now promote it under a collective mark as "il gelato di Bergamo."

At home: melt 60 g of chopped dark chocolate gently and let it cool until it feels only barely warm on a fingertip. Too hot and it melts the ice cream it lands on and sinks into streaks. Too cool and it thickens and drops in clumps. In the last minute of churning, pour it in a thin thread onto the moving ice cream, so the dasher shatters it as it sets. A 70 percent bar has the bitterness to answer all that milk sugar. A Dandelion Chocolate bar from Costa Esmeraldas in Ecuador (shop Dandelion Costa Esmeraldas 70%) weighs 56 g, close enough to the amount. Use a chopped bar, not chips. The chocolate bar percentage guide explains what that 70 is counting.

For a goat's milk version, swap the ribbon for goat's milk caramel, such as Fat Toad Farm's from Vermont (shop Fat Toad Farm goat's milk caramel), and the tub leans toward Mexico's cajeta, the goat's milk version of the same sweet. Keep the cow's milk dulce de leche in the base, since the numbers above were worked out for it.

If the tub disappoints

What you notice Likely cause Fix or prevention
Sandy or gritty, especially after storage Lactose crystals: too much dulce de leche in the base, a homemade batch that was grainy to begin with, or long storage with temperature swings Keep the base at 400 g and put any extra in the ribbon; sieve grainy dulce de leche before using it; eat it within the first week or so
Never firms up in the freezer Too much sugar in the base, often from extra dulce de leche stirred in, or a machine bowl that wasn't fully frozen Stick to the quantities; freeze the machine bowl as directed; a sweeter base needs a colder freezer
Icy, coarse texture Base churned while still warm, or repeated softening and refreezing Chill overnight to 40°F or colder; parchment on the surface; return it to the freezer promptly after scooping
Small greasy flecks, a buttery coating in the mouth Overchurned: the fat clumped into butter Stop at soft-serve; the freezer finishes the job
Ribbon disappeared Ribbon was warm or thin, or it was churned in or stirred too much Room-temperature ribbon, layered in lines, one pass of the knife
Ribbon stiff and chewy A homemade dulce de leche cooked very thick Loosen it with more cream, a teaspoon at a time, until it ribbons off the spoon
Chocolate in lumps instead of shards Chocolate too cool and thick, or poured all at once Barely warm chocolate in a thin thread, onto ice cream that's already at soft-serve

At 5,280 feet

Nothing in this recipe comes near the boil, so in Denver it works exactly as written. Altitude only matters when the dulce de leche is homemade. Colorado State University Extension puts water's boiling point at about 202°F at Denver's elevation, so a pot of sweetened milk simmers cooler and browns more slowly while the dry air speeds up evaporation. The stovetop dulce de leche recipe explains how to correct a pot that thickens before it colors. The shortcut from sweetened condensed milk has the same ceiling. It bakes in a pan set in a water bath, and that water can't get hotter than the local boil, so expect it to take longer to darken than a sea-level recipe says. Never heat the can unopened. The guide to cooking at altitude in Denver takes the same reasoning through the rest of the kitchen.

At the table

It needs very little. A shot of hot espresso poured over a scoop in a small glass makes an affogato, with the bitterness the dessert is otherwise missing. For anyone used to salted caramel, a few flakes of Maldon sea salt (shop Maldon sea salt) on each bowl will feel familiar, though Argentine dulce de leche ice cream is sweet and unsalted. For an Argentine afternoon spread, with alfajores and mate, the guide to Argentina's dulce de leche, alfajores and mate sets the scene.

Sources & Further Reading

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