How To Steam Soy Milk At Home - The Curdle Free Method!

How To Steam Soy Milk At Home – The Curdle Free Method!

Last updated on October 26th, 2023 at 16:19

Genuine coffee lovers enjoy experimenting with their coffee and enjoying the different taste that using different sugars and milks brings and learning how to steam soy milk at home without making it curdle is a skill that is easily mastered.

By the time you have finished reading this article, you will be able to make both steamed and frothed milk at home like an expert barista.

Keep reading as we dig down and get into the details of this tutorial.

How To Steam Soy Milk At Home With A Steam Wand

Steaming your soy milk at home is no different from making regular steamed milk. Just be careful of the milk temperature, more on this in a jiffy, so that you do not end up with curdled milk.

Use a heat-sensitive stick, which you can find on Amazon that will change color when your milk jug reaches 55C (130F).

Start by dipping the tip of the nozzle of your steam wand half an inch below the milk surface to create the milk foam. Once you have the maximum possible amount of foam, submerge the tip deeper to create a vortex of milk to mix some of the foam with the soy milk and create a rich velvet-like texture.

Once ready, pour slowly.

How To Steam Soy Milk At Home
Steaming Soy Milk At Home Is Easy

Read: Steaming vs frothing milk

Heat Is The Enemy Of The Perfect Texture

It is very important not to overheat your soy milk or any milk for that matter. Soy milk is more sensitive to heat than other milks as it causes the milk proteins to degrade at a lower temperature. When this happens, you will reduce the protein level which will in turn alter the balance of protein to acid in your soy milk.

… And when that happens, you will end up with curdled milk.

Acid – Public Enemy #1 For Soy Milk

To retain the fruity and natural character of your coffee, you need to be aware of the effect the coffee’s citric acids and malic acids will have on the soy milk. Acid is the arch-nemesis of soy milk.

Soy milk is high in proteins which react unfavorably with acids which lead to curdling and clumping. When you see curdling and clumping in your soy milk, it is due to an imbalance between the proteins and the acids. You need more protein than acids, which when this happens you have rich silk-like texture to your milk, and when you have more acids, your milk starts to get clumpy.

You need to be aware of the acidity of your coffee when you are thinking about using or making steamed milk. One solution if it is definitely the coffee, and you really want to make soy milk lattes, cappuccinos etc. is to add a little baking soda to the coffee, the espresso shot.

The baking soda will help to tone down and neutralize the acidity of the coffee without affecting the flavor.

How To Steam Soy Milk
Heat And Acid Are The Enemy!

Read: Boil milk for coffee

How To Steam Soy Milk At Home Without A Steamer

Start by pouring the amount of soy milk that you will be using into a saucepan and heat it gently. Don’t let it bubble or simmer, just heat it gently to below this point. Once it starts to bubble or a few seconds like 10 to 20 seconds later while on a low heat.

Then pour your heated soy milk into a cocktail shaker and shake vigorously for a minute. This shaking aerates your milk and creates the foam you are looking for. Also, this process of shaking the milk will help to create the rick silky texture.

Here is a quick recap.

  • 1 Use cold milk or cold soy milk as your starting point.
  • 2. Use only the amount that you need and no more. Pour into a saucepan.
  • 3. Heat gently on a low heat until it starts to bubble, count 10 to 20 seconds and take off the heat.
  • 4. Pour your heated soy milk into a cocktail shaker and shake vigorously for 60 seconds.
  • 5. Pour slowly into your cup of coffee and enjoy. Pouring slowly is important.

What Is The Ideal Temperature For Steaming Soy Milk?

The ideal temperature for steaming soy milk is 55C to 60C (130F to 140F). If you steam your soy milk at a higher temperature, you will destroy the proteins and milk fats and put the whole fat to protein ratios out of sync.

You can use a color-changing temperature sticker and stick it to your milk jug to ensure that you are not out with this temperature range.

How To Froth Soy Milk At Home Using A French Press

You can froth your soy milk at home very easily. First heat your milk to 55C (130F) and not more than 60C (140F), then bring it off the heat.

Then slowly pour your heated soy milk into your French press and pump vigorously (bit not too strongly) to aerate the soy milk until you have fluffy soy milk froth.

Once you have that fluffy milk, simply pour slowly into your coffee and enjoy.

What Is The Best Soy Milk For Frothing?

The top three brands for making top quality frothy soy milk and steamed soy milk are as follows:

  • 1 Trader Joes Organic Soy Milk.
  • 2. Organic EdenSoy Milk.
  • 3. Westsoy Organic Unsweetened Soy Milk.

Does The Type Of Soy Milk Matter?

No, there is no significant difference between the various types and brands of soy milk that are on the market, be they organic or non-organic, sweetened or unsweetened. One brand that stands out is Barista as their milk is focused on baristas for making steamed and frothed milk.

Their soy milk option is higher in protein and fat to help prevent the curdling of it in an acidic environment.

Does The Type Of Soy Milk Matter
You Can Use Homemade Soy Milk If You Want

Read: Steamed milk

Frequently Asked Questions About How To Steam Soy Milk At Home

Yes, steaming soy milk is very easy to do as long as you pay attention to what not to do and keep the milk temperature in the 55C to 60C  (130F to 140F) degree range and ensure it does not curdle.

You can put your soy milk in a cocktail shaker and shake vigorously for a min or two and then heat it in the microwave. While technically not steamed, it is frothy and aerated. Alternatively, you can use your French press and pump the plunger vigorously to make frothy soy milk.

Follow the step-by-step instructions below to steam your milk at home:

    • 1 Fill your microwave-safe container with the amount of milk that you need to steam.
    • 2. Heat it for 20 to 30 seconds.
    • 3. Pay attention to the time taken and check the temperature with a thermometer.
    • 4. At 150F (65C) you have the ideal temperature.
    • 5. Add to a cocktail shaker and shake vigorously for 60 seconds to make froth.
    • 6. Add the froth to your coffee.

Yes, I’ve tried successfully and managed to steam Silk Organic Soy Milk for a range of milk based coffee drinks including latte, cortado, flat white and a cappuccino. The key to my success was a shorter steaming time and a slightly lower steaming temperature when compared to steaming regular milk.

Whole milk is the best kind of milk to steam for a wide range of coffee drinks due to the higher levels of milk fats and whey proteins and in better ratios. The quality of the foam is better and there is a slightly better quality.

Is Soy Milk Good To Steaming?

Yes, soy milk is good for steaming and creates a good consistency for the microfoam. It, soy milk is temperature resistant which means you can work with your wand more without risk of scorching your soy milk.

How Do You Froth Soy Milk At Home?

Pour your soy milk into your milk jug and immediately begin texturizing it and stop when you notice the formation of a creamy texture.

Continue to gently heat your milk while allowing the absolute minimum amount of air as possible into your milk while steaming as too much air will produce a bubbly texture and spoil your foam.

Does Soy Milk Lose Nutrients When Heated?

When you heat soy milk, you improve the digestibility of the soy protein. There is little to no effect on the nutritional profile as you are gently steaming the milk.

Final Thoughts – How To Steam Soy Milk At Home

Learning how to steam soy milk at home is easy regardless of using a steam wand or using your French press to aerate the milk, or even the shakerato technique with a cocktail shaker to force air into the milk. 

Regardless of aerating the milk or steaming it, you need to be fully aware of not going over the 55C (130F) or 60C (140F) temperature range and maintaining the integrity of the proteins. 

If your milk is still curdling, then try the technique of using a little baking soda to neutralize the acidity of your coffee before pouring the milk into your coffee. 

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Derek Marshall, a certified barista by the Specialty Coffee Association possesses over two decades of experience in specialty coffee shops. He holds professional certifications for coffee brewing and barista skills. Derek is also an author with authoritative books covering various coffee topics including specialty coffee, sustainability and coffee, coffee brewing, coffee recipes, coffee cocktails and books focusing on Brazilian coffee, Vietnamese coffee, Indonesian coffee and Malaysian coffee. As a barista for over two decades, Derek Marshall has worked in specialty coffee shops across the United Kingdom, Spain, Thailand, Malaysia, Cambodia, Indonesia, and Vietnam. His expertise extends to the distinct coffee cultures, specialty beverages, and brewing techniques of each nation. Functioning as a coffee consultant, Derek charges US$50 per hour. To learn more about Derek Marshall and Latte Love Brew, visit his About Me Page. For coffee inquiries, contact him at +34-639-410-375 or, mentioning your name and location

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