Cold foam makes a delicious addition to any cup of coffee (usually cold brew, though it can work well on iced and even hot coffee). Part of the beauty of this foamy treat is how different it can be depending on your personal tastes and dietary restrictions. Cold foam can be made with all sorts of ingredients and milk alternatives, including oat milk.
To make oat milk cold foam, start by brewing your cold brew coffee and then add oat milk to your frother. Froth the milk and pour it on top of your brewed drink. You can add other ingredients to the milk, like a flavored syrup or an extract, before you froth it for extra sweetness.
Let’s take a closer look at how to make oat milk cold foam, including a step-by-step guide and some alternative frothing methods in case you don’t have a frother at home.
What Is Cold Foam?

Cold foam is essentially just frothed milk, which means it’s pretty easy to make. If you’re using cow milk, it’s best to go for 2% or low-fat milk since they tend to froth the best. However, cold foam can also be made with plant-based milk alternatives, and oat milk (on Amazon) is one of the most common options.
You can also add different flavors to your oat milk cold foam using simple syrups and extracts. Some people aim to replicate Starbucks’ pumpkin spice flavor, while others like to simply add a touch of vanilla extract to sweeten the drink up.
Cold foam can make any coffee drink a little more palatable for those who may not enjoy the naturally bitter taste of coffee.
How Do You Make Cold Foam Using Oat Milk?
It’s very easy to make cold foam using oat milk. Oat milk froths very easily, so it can be easily added to your frother (on Amazon) and then poured on top of your drink right after.
Here’s the full process:
Step 1: Make Your Cold Brew
The first thing you need to do is make your cold brew coffee (or whichever coffee drink you prefer to use). For this, you should ensure that you grind coffee beans first. They should be fairly fine.
Once you’ve done that, you need to measure the coffee out with some water. You’ll want about four parts water to one part coffee.
Ideally, let the coffee steep at least overnight — but a few hours can do the trick if you’re in a rush. The longer, the better, so it’s a good idea to make your cold brew coffee in advance and try to anticipate how much you’re going to drink.
Finally, pour it over a strainer and you’ve got the perfect cold brew coffee.
Step 2: Add Oat Milk to Your Frother
Now that your cold brew is ready to use, it’s time to make the cold foam. You can do this by adding oat milk to a frother and letting the device work its magic. This usually takes around twenty seconds.
Before frothing, you might also choose to add some flavor. You can make your own syrup beforehand if you have a specific flavor in mind, or you might choose to add a little sugar to sweeten it up.
Heavy cream will also make the oat milk frothier, but if you’re on a plant-based diet, this is likely not an option.
Are There Alternative Methods of Frothing Milk?
If you’re craving cold foam but don’t have a frother on hand to make it right this second, there are a couple of other methods you can use.
The first is a blender. Simply pour the oat milk in and start the blender at a slow speed, working up to the fastest. This should forth the milk nicely.
Alternatively, you can use a hand mixer to froth the milk in the same way.
If you don’t have any of this equipment on hand, then you can put the milk in a jar, seal the lid tightly, and shake it by hand. It may take a couple of minutes and some force behind the shaking to get the milk to froth — but it will work!
Step 3: Add Ice and Cold Brew to a Glass
Next, you’ll want to add the cold brew and some ice to your desired glass.
Step 4: Pour Cold Foam on Top and Serve

Add the cold foam on top of the cold brew. It should stay there or only sink in gently.
Then you can add some toppings to the coffee. Many people choose to add a sweet spice like cinnamon, and others go for shaved chocolate. You can even add some vanilla syrup for added flavor. Just make sure you consider the flavor of your cold foam before you add toppings; not every add-on will interact well with your drink.
Now all that’s left to do is enjoy the coffee.
The Final Word
As you can see, it’s very easy to make cold foam with oat milk. Oat milk froths nicely, and the frothers available today are very easy to use. Cold foam will taste great on cold brew coffee, but it can also work well on other iced and hot drinks.