How to Reheat Coffee In The Microwave (The Best Way)

I like my coffee hot and honestly, I can’t trust anyone who drinks lukewarm coffee. I’m not kidding. I mean, what did the poor taste buds ever do to you that you’d want to punish them like that? 

I get it. I know why you may feel like you have no choice but to do this unthinkable thing. It’s a day-to-day dilemma for me. I forget to drink your coffee until it gets cold and you hate to waste good coffee. So, what do I do? 

Please don’t say “drink it as is” when I can simply reheat it in a microwave. I’m not psychic but I can hear you asking, “Is there a way to reheat coffee in the microwave and still retain the flavor and taste? 

Yes. I microwave my coffee almost every day. Therefore, I can confirm that there is a way to reheat your coffee to get amazing results.

In this article, I will be showing you the best way to reheat your coffee in the microwave, so that on those days you’re torn between drinking lukewarm coffee and wasting it, you can end up sipping a steaming cup of coffee, without the guilt of wastage.


Yes, you can reheat coffee in the microwave, but be careful to use low-heat or you’ll end up burning the coffee. Some people believe that reheating your coffee will cause it to lose the original taste, aroma, and flavor, but using the microwave is the most convenient way to reheat coffee. 

Just be safe. You don’t want to have milk or creamer in your coffee when reheating, as it could be unsafe to drink – depending on the temperature in your area and for how long the coffee has stayed. After two long hours without being refrigerated, in most cases, milk is considered bad.

Please pay attention. If you have only left your coffee for some minutes, perfect. You can reheat it in the microwave with no qualms. But if you leave black coffee for up to four hours without drinking it, then I’m sorry. You’ve just got to throw it away because at this point, the coffee becomes acidic and its oils are beginning to get bad.

So, don’t waste a good cup of coffee. If you prepare some for yourself and decide to not drink it until after four hours, be sure to preserve it in the fridge. This way, you can reheat it at any time, no matter how long it takes to rekindle your interest again.


Before anything else, pour the coffee into any microwave-safe cup. Depending on the amount of coffee, ensure your microwave is set to anything between low to medium heat. Then carefully place it in the microwave and turn on the machine. Microwave for about 45 seconds, stir it and your coffee is ready to savor.

The trick is to slowly reheat the coffee, so you don’t end up burning it. If you do, the result is usually a bad and bitter taste. When the temperature is about 150 degrees Fahrenheit, the coffee should be ready, but only you know what temperature works best for you. 

So, you don’t get to leave it all up to the microwave to decide. If you do, it’s going to ruin your coffee. A microwave cannot read your mind, it cannot see how much coffee is in your cup. It cannot feel how cold the coffee is. In the future, hopefully, we can have smart microwaves, but today, only you are responsible.

Reheating coffee in the microwave is more of an art than something you just do. At some point, it requires you to keep microwaving it at 30-second intervals until it arrives at your preferred temperature. 


Yes, and don’t worry, there are no health dangers here. The myths, about microwaves being bad for you, are untrue. You won’t get cancer and you won’t lose the caffeine in the coffee when you reheat it in a microwave. 

The science between heat and coffee is a whole lot, but I have to say that under no circumstances should you use cardboard or metal cups in the microwave. Do not cover the top of the cup when microwaving. If you do, the steam will burst the mug and create a hot mess in your microwave. Also make sure there are no frozen coffee cubes in your cup when microwaving, if there are, defrost them first. 

You may notice a slight change in taste, after microwaving your coffee. Apart from that, nothing more changes. So, if you’re wondering whether the change in taste is a sign that your microwaved coffee is unhealthy, it is not. Fret not. 


It would normally take 45 seconds to reheat a half cup of coffee in the microwave with a medium-high power setting. A lot depends on the wattage of your microwave and your preferred coffee temperature. So, you must adjust your microwave accordingly. Ideally, when reheated, coffee should be 140 degrees Fahrenheit, which is slightly lower than the temperature of freshly made coffee.

Heating coffee causes some chemical changes, so it is important to check the coffee at intervals of 30 seconds while nuking it at 10-second intervals to reduce the risk of chemical changes that occur during the process and so that it does not get burnt. 


  1. Try not to overheat the coffee by leaving it in the microwave unattended. 
  2. Take out the coffee at intervals and stir it, so that the heat distributes evenly.
  3. On no account should you cover the coffee when it is being microwaved. The steam from the boiling liquid might be too strong that it explodes, while still inside the microwave.
  4. Don’t reheat coffee that contains milk, if you leave it at room temperature for more than two hours. There’s nothing you can do to salvage it. It’s bad and unhealthy for you.
  5. When coffee is reheated, it may become bitter. Add a pinch of sugar or creamer to improve the taste.


Yes, you can reheat coffee on a stovetop. First, pour the coffee into a pot. Make sure the stove is set to low heat, just like when you’re using a microwave. Allow it to gradually heat up and then take down the pot when the coffee is about to begin boiling. Finally, serve the coffee in a mug.


Even though reheating coffee in the microwave is relatively easy to do, you may not want to do it. For whatever reason. You are probably wondering if there is a way to prevent your coffee from getting cold, even if you leave it for hours.

Well, I have my ways.  Let me show you.

  1. Brew small amounts of coffee at a time. This way, you can brew a fresh pot of coffee each time, without feeling any guilt from throwing away leftover coffee.
  2. Cover your coffee mug with a lid to prevent the steam from escaping. This will give you a little more time before your coffee goes cold.
  3. Pour some ice into that Joe. While iced coffee may not be your favorite, if your coffee keeps getting cold before you finish it, take it as a sign from the universe and go it for the gods. 
  4. Thermal cups help keep your coffee warm for longer periods than ordinary mugs. Whenever you’ve made excess coffee, preserve it in a thermal cup, if you have one.
  5. Getting a smart mug might do the trick for you, though it is more expensive, it has its advantages. Apart from keeping your coffee warm for hours, it can help you keep track of your caffeine consumption, inform you if your coffee is too hot and let you control the temperature via your phone.


You don’t have to throw away your precious coffee every time it gets cold. And you don’t have to punish your taste buds by drinking lukewarm coffee. You can reheat your coffee in the microwave and have it turn out great if you do it the right way. It is possible to retain the original flavor and taste. Just follow the steps laid out in this article and you’ll be able to enjoy your coffee every time. 

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