Does Instant Coffee Need Hot Water?

The common misconception is that instant coffee doesn’t need hot water. In fact, some or perhaps many of the people you know might have gone so far as to say that it’s unsafe to use it with hot water. Why? Well, they probably heard it from someone who heard it somewhere.

It’s a common piece of advice propagated on the Internet and by word of mouth, albeit in different variations. A quick Google search reveals that both of these pieces of advice are widespread but not necessarily correct. Let’s examine why this is the case and debunk the myths surrounding instant coffee and hot water once and for all.

Does Instant Coffee Need Hot Water?

Does Instant Coffee Need Hot Water?

This is the first question we should tackle, as this is the basis of the entire myth. Is instant coffee supposed to be made with hot water? The short answer is no. The long answer is that instant coffee is designed to be made with water that is just boiled.

It’s not expected to be made with boiling hot water, nor does it require scalding hot water. The main reason why people believe that instant coffee requires hot water is that it has a very high solubility rate. This means that the coffee will dissolve more quickly in water.

This is why you need to use boiling water when making it. However, this doesn’t transfer to the water poured over the coffee being hot. In fact, boiling water helps dissolve the coffee more quickly because it accelerates the process of dissolving. It doesn’t have a direct effect on the temperature of the water.

Do You Have to Use Hot Water with Instant Coffee?

No, you don’t have to use hot water with instant coffee. While it’s recommended, you can use water that is just boiled and cooled slightly. It’s recommended that you use just boiling water because it will dissolve the coffee more quickly.

While it may be tempting to use colder water, never use hot water that’s been sitting on the stove for several minutes. This is because higher-quality coffees are more susceptible to being burnt. The longer water is heated, the hotter it gets.

Coffee is a delicate beverage that’s susceptible to burning. It’s why some coffee drinkers will use a cooling device after pouring their coffee. This is to reduce the likelihood of the coffee being burnt.

Is There Any Scientific Proof that Pouring Boiling Water Over Instant Coffee Actually Burns the Coffee?

No, In short, boiling water does not actually burn the coffee itself. However, it does have the potential to burn the coffee grounds if you pour it into your cup. The reasons for this are twofold. Firstly, the coffee that’s made from instant grounds is a finely ground powder.

The instant coffee grounds are extremely fine and are prone to clogging. If the coffee grounds clog up the bottom of your cup, it’s very likely that the boiling water will seep through and burn the coffee. This is because the coffee filters are so fine, there isn’t really a barrier between the hot water and the coffee grounds themselves.

Can You Make Instant Coffee with Hot Tap Water?

We’ve established that it is better to use boiled water when making instant coffee. What if you don’t have a kettle? What if you don’t have access to a stove and you’re out of the house? Can you make instant coffee with hot tap water?

The answer is yes, it’s not going to kill you. Assuming that the water is clean, it’s not going to have a detrimental effect on the flavor of the coffee. That being said, using hot tap water is not recommended if the water is of poor quality and may have organisms, and is not sanitized. Make sure the water is fit for human consumption and is of good drinking quality.


Whether you’re a fan of instant coffee or not, we can all agree that it’s important to know how to make it correctly. Luckily, it’s quite simple to make and doesn’t require much effort. All it takes is a pot of boiling water, the proper amount of coffee, and a spoon for mixing.

Keep in mind that the water needs to be at a full boil before you add your coffee. Once it’s dissolved, it’s best to let it sit for a minute or two before you drink it. This is to allow the flavor to settle. It’s also important to remember that instant coffee doesn’t need hot water.


When it comes to coffee, there is no better resource than our website. Whether you’re looking for tips on improving your brewing technique or a comprehensive guide to different types of coffee, we have everything you need right here.

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