Can You Put Milk In A Keurig? Is It Such A Terrible Idea?

July 8, 2021 by Madelyn Doyle

When you own a Keurig coffee machine, it is likely that you will have a lot of questions in your mind. You want to make sure that you’re using this coffee machine properly, and that you’ll make a quick and perfect cup of coffee.

One of which would be: Can you put milk in a Keurig? and that’s great if it makes a latte or hot chocolate. Let this article answer it for you!

Can You Put Milk In A Keurig?

The short answer is No, you cannot add milk to your Keurig. By doing so, you’ll endanger your machine and create a lot of work for yourself afterward. Pouring milk into a Keurig is a terrible idea. The most straightforward explanation is that Keurig machines come with a water tank rather than a milk tank.

It means only water should fill it. Anything else will block the piping system and the machine’s guts.

The cons clearly outweigh the pros in this case, no matter how much you adore creamy hot coffee and are searching for a quick way to prepare it. 

Some people may try this alternate method of utilizing a Keurig for a variety of reasons. But let us emphasize it again, no matter how motivated you are, do not attempt this.

What Is A Keurig?

Keurig is a coffee brewer that dispenses a single cup of coffee at the push of a button. You don’t have to buy ground coffee if there’s a coffee brewer in your home. 

Instead, you’ll buy K-cups, which are small plastic pods. These are the containers in which the ground coffee is preserved.

John Sylvain despised the drip-brewed coffee given in offices, which was kept warm on warming plates as it stalled minute by minute.

He envisaged a machine that could swiftly and simply make a single cup of coffee. It would be even easier to operate than currently available brewing equipment. And no one in the workplace would ever have to drink stale coffee again.

He constructed a machine and coffee pod after a lot of trial and error to create the Keurig.

How Does Keurig Work?

Keurig comes in a wide variety of versions with numerous features, but the core operation stays the same. It makes a Keurig coffee machine up of two parts:

1. The machine itself and the single-serve coffee pod contain just enough ground coffee to make a perfect cup of this caffeinated beverage.

2. When you put the coffee pod into the machine, a needle punctures it while also pumping water. The water is heated by the Keurig coffee machine and pumped through the coffee pod, which causes the coffee to flow into your cup.

It may appear to be a lot of labor, but all you have to do is insert your preferred coffee pod and push a button to use Keurig’s coffee machine.

What Happens If You Put Milk In A Keurig Instead Of Water?

You’ll run into one of these three problems after adding milk to a Keurig:

The reservoir will get spoiled

Keurig is a great coffee maker since you can keep water in the reservoir until you’re ready to use it. 

The milk residue will deteriorate and curdle, leaving a foul odor and molds that are difficult to remove

Because germs can develop in water that has been standing for over twelve hours, we strongly advise against using it. Regardless, leaving water in the reservoir for four or five hours isn’t a terrible idea.

However, milk is a different story. At room temperature, milk degrades quickly, and if you leave it in the heated confines of a Keurig water tank, it will curdle in no time.

If you want to create hot chocolate or any other milk-based beverage, you’ll need to add fresh milk directly to the heating device, such as the microwave oven. 

But be in mind, whether for immediate or later usage, you should never put milk in a coffee brewer water reservoir. The simple reason behind this statement is that removing the milk from the container is no piece of cake. 

Even if burnt milk is not the worst thing on Earth, its residue might be; it will deteriorate and curdle, creating an impossible-to-remove foul odor.


In less than a minute, the heating coil in a Keurig can set the water temperature to the boiling point. This fast boiling of water can cause your milk to burn, resulting in a sour or bitter beverage. 

If you notice a strong, harsh odor after heating your milk in a coffee brewer, this might be a sign that it has burnt.

Scorched Metal

The curd formed by the burnt milk will adhere to Keurig’s heating element. It may burn the metal, and the accumulation will prohibit it from functioning properly.

Because accessing the interior elements of the machine may be difficult, this hard milk crust is extremely tough to remove. 

Clearing the crust using a spoon or scraper may be difficult, and you risk scratching and damaging the components.

How To Fix A Keurig After Putting Milk In It?

Manufacturers construct most coffee brewers in such a way that we can only use them with water. The water pipes that travel from the reservoirs to the pumps are prone to clogging.

The filter, in particular, is prone to clogging by tiny particles, the worst of which is milk. Even if your Keurig has a warranty, you can have problems if you add milk; the guarantee will not apply in this scenario.

To solve the problem, try rinsing out the reservoir first. Rinse it thoroughly and check for any remaining milk.

Reconnect the reservoir to the machine and perform the brewing cycle to remove any remaining milk from the water lines.

Machine residues that are difficult to dissolve in water cause a distinctive flavor. Using a milk froth cleaning solution, which removes milk remnants from espresso machines, is an easy trick.

You may clean the water lines with any alkaline-based fourth cleanser; the products should ultimately remove all residues except the milk.

Regular cleaning practices may assist in preventing the accumulation of microorganisms in the equipment. When cleaning your Keurig, be sure to take out all the moveable components and thoroughly clean and dry them.

After using a machine with a detachable filter for a long time, you may wish to replace it regularly. White vinegar is the most frequent method for cleaning the inner workings of your Keurig.

Fill the reservoir halfway with a 50:50 solution of white vinegar and water, then run the fluid through the brewer to dissolve and clear any remaining residues or particles.

Fill the reservoir with water once you’ve finished cycling the water to rinse away the vinegar accumulated in the water lines. You can rinse it many times to ensure that the flavor of your next cup of coffee is still good.

Wipe off the outside of your machine as well, and make sure it’s completely dry. That concludes the discussion about using a coffee brewer with milk instead of water in the designated water tank.

FAQs Of Can You Put Milk In A Keurig

Here are some frequently asked questions we have collected while researching this topic.

1. How to clean a Keurig after every 3 to 6 months using?

You should clean your Keurig machines every three to six months to eliminate mineral elements and avoid them from impacting the function of your appliance and the flavor of your beverage. Follow the steps below:

First, Empty the water reservoir.

Second, Pour half a cup of distilled white vinegar into the water reservoir. Fill it halfway if you’ve been diligent about descaling or completely if you’ve neglected this task for a long time.

Third, Pour a cleaning brew into a big ceramic mug and set it on the drip tray.

Next, Empty the water reservoir of any leftover vinegar. Clean, fresh water should be used to refill it.

Then, Use fresh water instead of vinegar to repeat the process stated above in step three.

Finally, Replace the refill for the water cartridge.

2. Alternative to adding milk In a Keurig

What if you’re aware that you shouldn’t use milk in your Keurig machine, but you still enjoy a rich latte or cappuccino. So, how do you go about it? What is your alternative?

Option 1: Obtain milk pods. Dry whole milk is commonly used to make milk pods. The problem is that Keurig doesn’t make its exclusive milk pods, so you’ll have to tweak your machine to get them to function. 

This is yet another technique to hack your machine. Then you’d have to brew your coffee after you’d made your milk pod.

Option 2: Rather than brewing coffee and then making a milk pod (which you shouldn’t do in a Keurig) or brewing coffee and then heating and frothing your milk separately, purchase a machine that does both.


Can you put milk in a Keurig? The answer is No! A Keurig is a wonderful appliance to make a beautiful cup of customized coffee, but it’s not made for heating milk.

We hope this article gives you detailed information about Keurig and how to fix it if you accidentally add milk to its water reservoir.

Remember to remind everyone in your household and office that the coffee brewer is just for water since it can get damaged if you add milk to it instead; now, you know the reasons why.


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