Dulce de Leche (from condensed milk)

Name: Dulce de Leche (from condensed milk)
Prep time: 5 min
Cook time: 3 h 30 min
Total time: 3 h 35 min
Yield: 1 servings
Ingredients: 1 395g can sweetened condensed milk; water, to fill the saucepan; a drop of dish soap for removing the label

There is no fancier version of this recipe. You put a can of condensed milk in a pot of boiling water, you keep it there for three and a half hours, and when it cools down you open it and it has turned into dulce de leche. That is genuinely the whole thing.

The one rule you cannot ignore: keep the can fully covered in water the entire time, and never open it while it is still hot. Those two things done, you are golden.

How to Make Dulce de Leche (from condensed milk)

Three stages: prep the can, simmer for three and a half hours, cool completely. The actual hands-on time is about ten minutes.

1. Prep the can

1
Line up the cans.
2
Soak in warm water with a drop of dish soap to remove the label and any glue residue.
3
Peel the label off each can completely, removing any remaining paper or glue.

Cans of sweetened condensed milk lined up

2. Simmer

1
Bring to a full boil over high heat, lid off.
2
Reduce to a steady gentle simmer.
3
Cook for 3 hours 30 minutes, checking every 30 minutes and topping up with boiling water to keep the can submerged.

3. Cool completely

1
Turn off heat. Leave the can in the water.
2
Do not touch or open the can until the water is fully cool — at least 1 hour.
3
Open carefully and transfer to a jar.

How to Serve

This recipe makes about 400g — enough for one big project or several small ones. Here are the La Mesa Eats recipes that use it:

Walnut Alfajores — the classic Argentine biscuit sandwich, filled with dulce de leche and rolled in coconut or dipped in chocolate.
Dulce de Leche Baked Cheesecake — a rich, silky baked cheesecake with dulce de leche swirled through the batter and poured on top.

The Recipe

Prep5 min

Cook3h 30m

Total3h 35m

Serves1

DifficultyEasy

Ingredients

for 1 serves

1395g can sweetened condensed milk
water, to fill the saucepan
a drop of dish soap, for removing the label

Instructions

Fill a bowl or your sink with warm water and add a small squirt of dish soap. Submerge the can and leave it for a few minutes, then peel the label off completely. Remove any remaining glue or paper residue. A clean can means no burnt paper smell while it simmers.
Place the can on its side in a large, deep saucepan. Cover with cold water by at least 5cm (2 inches) above the top of the can. The more water you use, the less often you will need to top it up.
Bring the water to a full boil over high heat with the lid off. Once boiling, reduce to a steady, gentle simmer. You want consistent bubbles, not a rolling boil.
Simmer for 3 hours 30 minutes. Set a timer every 30 minutes to check the water level. Each time, top up with boiling water from a kettle to keep the can fully submerged. Never let the water drop below the top of the can — this is important for safety.
After 3 hours 30 minutes, turn off the heat. Leave the can in the water and do not touch or move it until the water has cooled completely to room temperature — at least 1 hour, ideally 2. Do not attempt to open the can while it is still warm.
Once fully cool, open the can carefully. Inside you will find a smooth, deep caramel-coloured dulce de leche. Transfer to a jar if not using immediately.

Tips & Notes

Never open the can while hot

This is the one non-negotiable rule. The pressure inside a heated can is significant. Always let it cool to room temperature in the water before opening.

Keep the can covered at all times

If the water evaporates and the can is exposed, even briefly, it can rupture. Use a large saucepan with plenty of water and check it every 30 minutes. Always top up with boiling water, not cold, to keep the temperature stable.

Cook multiple cans at once

Since it takes 3.5 hours either way, cook two or three cans at once and stock the pantry. Unopened cans keep for months at room temperature.

Colour and cook time

2.5 hours gives a lighter, more pourable caramel. 3 hours gives a classic medium dulce de leche. 3.5 hours gives a darker, thicker, more intensely flavoured result. For spreading on alfajores or spooning over ice cream, 3.5 hours is the one.

Storing

Once opened, transfer to a clean jar and refrigerate for up to 2 weeks. It will thicken in the fridge — leave it at room temperature for 10 minutes before using.

How It Turned Out

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How to Make Dulce de Leche (from condensed milk)

Three stages: prep the can, simmer for three and a half hours, cool completely. The actual hands-on time is about ten minutes.

1. Prep the can

1
Line up the cans.
2
Soak in warm water with a drop of dish soap to remove the label and any glue residue.
3
Peel the label off each can completely, removing any remaining paper or glue.

2. Simmer

1
Bring to a full boil over high heat, lid off.
2
Reduce to a steady gentle simmer.
3
Cook for 3 hours 30 minutes, checking every 30 minutes and topping up with boiling water to keep the can submerged.

3. Cool completely

1
Turn off heat. Leave the can in the water.
2
Do not touch or open the can until the water is fully cool — at least 1 hour.
3
Open carefully and transfer to a jar.

How to Serve

This recipe makes about 400g — enough for one big project or several small ones. Here are the La Mesa Eats recipes that use it:

Walnut Alfajores — the classic Argentine biscuit sandwich, filled with dulce de leche and rolled in coconut or dipped in chocolate.
Dulce de Leche Baked Cheesecake — a rich, silky baked cheesecake with dulce de leche swirled through the batter and poured on top.

Instructions

Fill a bowl or your sink with warm water and add a small squirt of dish soap. Submerge the can and leave it for a few minutes, then peel the label off completely. Remove any remaining glue or paper residue. A clean can means no burnt paper smell while it simmers.

Place the can on its side in a large, deep saucepan. Cover with cold water by at least 5cm (2 inches) above the top of the can. The more water you use, the less often you will need to top it up.

Bring the water to a full boil over high heat with the lid off. Once boiling, reduce to a steady, gentle simmer. You want consistent bubbles, not a rolling boil.

Simmer for 3 hours 30 minutes. Set a timer every 30 minutes to check the water level. Each time, top up with boiling water from a kettle to keep the can fully submerged. Never let the water drop below the top of the can — this is important for safety.

After 3 hours 30 minutes, turn off the heat. Leave the can in the water and do not touch or move it until the water has cooled completely to room temperature — at least 1 hour, ideally 2. Do not attempt to open the can while it is still warm.

Once fully cool, open the can carefully. Inside you will find a smooth, deep caramel-coloured dulce de leche. Transfer to a jar if not using immediately.

Tips & Notes

Never open the can while hot

This is the one non-negotiable rule. The pressure inside a heated can is significant. Always let it cool to room temperature in the water before opening.

Keep the can covered at all times

Cook multiple cans at once

Since it takes 3.5 hours either way, cook two or three cans at once and stock the pantry. Unopened cans keep for months at room temperature.

Colour and cook time

Storing

Once opened, transfer to a clean jar and refrigerate for up to 2 weeks. It will thicken in the fridge — leave it at room temperature for 10 minutes before using.