Can You Use Coffee Grounds Twice For Cold Brew - The Cold Brew Lover's Answer

Can You Use Coffee Grounds Twice For Cold Brew? – The Cold Brew Lover’s Answer

Last updated on November 30th, 2023 at 20:52

A frequently asked question by coffee enthusiasts is can you use coffee grounds twice for cold brew? 

While there are a few coffee blogs and websites that say that you can, the open, honest, and accurate answer is that, sadly, you cannot use your coffee ground twice for cold brew or for any brewing method.

Keep reading to find out why you cannot re-brew or reuse your coffee grounds more than once and what you can do with your old coffee grounds, and a great section telling you how to make a masterful cold brew coffee like a master barista.

Can You Use Coffee Grounds Twice For Cold Brew?

No, coffee grounds have a lot of oils and compounds in them that, when well brewed, will result in an amazing tasting cup of coffee.

You should get all of those compounds and oils in your cup the first time round. If you are not, the result will be a cup of coffee that is less than perfect, and if enough is left in them for a second cup of coffee, that too will be an average less than perfect cup of coffee.

Even though you are using a cold brewing extraction method, it does not mean that you can then use your grounds twice and get a cheeky second cup or batch out of them if you switch to a hot brewing method for your second round of brewing.

I’ve seen some websites and blogs claiming that you can use your grounds twice for cold brew – either they are flat out lying or they are not getting a top quality cold brew the first time round.

There is no harm in you trying yourself to find out. I suggest you make your experiment as an additional batch, as I don’t want you to waste your time or to be disappointed at not having a legitimate batch of cold brew coffee to enjoy.

The reason that many coffee enthusiasts are eluded into thinking that can use coffee grounds twice for cold brew is due to the aromatic scent from the grounds when they are strained. This is expected and normal.

You need heat to extract the volatile oils which give off the rich aromas with heat. Since no heat is used in cold brewing, those oils remain in the grounds. This is the very reason that cold brew method of making coffee lacks aroma.

Can You Use Coffee Grounds Twice For Cold Brew
You Can’t Use Coffee Grounds Twice For Cold Brew

Read: Do coffee grounds kill ants?

What Happens If You Brew Coffee Grounds Twice?

When you try to brew your coffee grounds for a second time, no matter what the brewing method is, you will end up with a very weak and very watery cup of coffee.

All the coffee solubles and compounds are extracted with the first round of brewing. If you can get a good, or even a reasonably good, cup of coffee from the second round of brewing, then you really need to focus on what is going wrong with your first round of brewing with fresh grounds, that is not extracting all the coffee solubles and coffee oils.

Depending on which brewing process you are using, you have to take a look at the following variables and make adjustments:

  • Water Temperature.
  • Grind Size.
  • Brewing Time.
  • Coffee To Water Ratio.

Fix one at a time and find out what the error may be.

If you are rebrewing coffee with your coffee grounds while they are still wet or damp, you will end up with a bitter, over-extracted coffee. If you wait for them to dry out and try re-brewing dried coffee grounds, you will still not get a good cup of coffee. The result will be a sour and under-extracted cup of coffee.

This stands true for whatever brewing method, even the most popular brewing methods and not so common brewing methods.

As I said, if this is not the results you are getting when rebrewing, you are doing something wrong with your first round of brewing with your fresh grounds.

What Happens If You Brew Coffee Grounds Twice
Brew Coffee Grounds Twice…Not Good!

Read: Can you reuse coffee grounds for cold brew?

How To Make Cold Brew Coffee Like A Master Barista

The cold brew method of elaborating a cup of coffee is one that is very easy to make and requires very little equipment.

Let’s get on with the cold brewing method.

Equipment Needed

Very little equipment is needed to make this coffee, naturally some you do need.

  • A ceramic burr coffee grinder to grind your coffee beans.
  • Freshly roasted whole coffee beans.
  • A glass container with an airtight lid.
  • A metal coffee filter or fine mesh sieve.
  • Filtered water, better still, use mineral water.
How To Make Cold Brew Coffee Like A Master Barista
Cold Brew Coffee Is Easy To Make

Read: Can you reuse coffee grounds?

The Method, Instructions

The cold brew process is very easy. I suggest that you stick to a coffee to water ratio of 1:8, part coffee and 8 parts water.

At Latte Love Brew, we encourage you to adhere to the barista principle of using the best possible ingredients. It might seem like a tiny, unimportant thing, but use mineral water. You will notice a difference. Coffee is 98 to 99% water after all.

To make a worthwhile 40 ounces (1.2 liter) of coffee, which is a reasonable amount to make since brewing time is very long. Weigh 5 ounces (150 grams) of coffee beans.

I insist that you weigh your coffee beans when they are whole. The mass is the same when you grind them. The difference is keeping them fresher for a little longer.

Ensure that your ceramic burr grinder is clean and free from coffee grinds and oils before you start grinding, to avoid getting any old grinds or oils into the coffee that you are about to brew.

Using specialty grade coffee beans of a medium, medium-dark or dark roast, weigh 150 grams of coffee beans and then grind them to a coarse grind size and then add them to your 1.2 liters of mineral water or, at the very least, filtered water to your glass container that has an airtight lid.

For the best results, ensure that you use mineral water that is ice-cold or, at a minimum, refrigerated.

Place your coffee and water container in your fridge to brew. We are brewing in your fridge with cold water as we want to extract the low temperature compounds. Let your coffee brew for 12 hours to 24 hours.

Taste test after 12 hours and if it is not to the status and taste that you expect, leave it in your fridge for 2 to 3 hours more and taste test it again.

Continue this process a few times as required until you get that great tasting cold brew coffee that you want.

When your cold brew is ready and hits that spot for you, filter out your coffee grounds. If you fail or forget to remove the coffee grounds, they will continue to extract, and you will end up with an overtly bitter cup of coffee.

Use a metal coffee filter to filter your ground for the best tasting coffee. If you don’t have a metal coffee filter, consider buying one – they are cheap enough. Meanwhile, use a fine-mesh sieve.

Metal filters are better due to leaving in all the coffee oils and resulting in a flavorful and full-bodied coffee. You can decant and store your coffee back in the same glass container that has an airtight lid.

A glass container that is airtight is important, as coffee is very good at absorbing flavors and compounds from other food items.

Coffee is also acidic and will draw out the chemicals from a plastic container.

Frequently Asked Questions About Can You Use Coffee Grounds Twice For Cold Brew?

What Can I Do With Leftover Coffee Grounds From Cold Brew?

There is undoubtedly a lot that you can do with your leftover coffee grounds – don’t just throw them out, as that is such a waste.

Here are some ideas:

  • 1. Fertilizer Your Garden.
  • 2. Neutralize Odor.
  • 3. Repel Insects.
  • 4. To Spruce Up Your Compost Pile.
  • 5. Exfoliate Your Skin.
  • 6. To Exfoliate Your Scalp And Stimulate New Hair Growth.
  • 7. To Get Rid Of Fleas On Your Pet.
  • 8. Meat Tenderizer.
  • 9. Grow Mushrooms.
  • 10. Repair Scratched Furniture.

There are many more uses for used coffee grounds. Instead of throwing them out, repurpose them.

Can Coffee Grounds Be Reused?


there are many uses for used for coffee grounds for one, rebrewing coffee grounds for a second a cup of coffee is not one of them. Re-brewing coffee grounds simply results in weak, second rate coffee, if you are lucky!

…Or unlucky, as getting a good second cup out of re-brewed coffee grounds is indicative of poorly brewed coffee during the first round of brewing with your fresh coffee grounds.

Reusing for a second cup lacks that coffee flavor that you are looking for. The method that you use does not matter, be it with a drip coffee maker, French press and Keurig or whatever ever, it just can’t be done.

There are alternate uses for used coffee grounds, though, which can be to keep ants, rodents, mice, etc away from your property, to fertilize your garden, plants and compost pile are popular uses.

What Is The Best Ratio For Cold Brew Coffee?

The best ratio for cold brew depends on a few factors, and what you want to brew and what you want to do with your cold brew when you have made it.

If you want to drink it as it is straight from the fridge without the need for dilution, then a coffee to water ratio of 1:8 is best.

If you want your cold brew to last longer in your fridge, then a 1:4 ratio is perfect. Just don’t forget to add 2 parts of water for every part of coffee in your final beverage.

If you plan on drinking cold brew hot, the best ratio is 1:1 or 1:2 and then dilute with 8 or 4 parts of hot water.

How Many Times Can You Reuse Coffee Grounds For Cold Brew?

You can only use your coffee grounds once for making cold brew coffee. Even though the coffee grounds are still aromatic when you have finished brewing your coffee, you still can’t reuse them, as all the flavor compounds have been extracted.

The grounds are still aromatic due to them needing a high temperature to extract them – they are called volatile oils, as they need an elevated temperature for extraction.

Cold brew is the same as any other method – if you are not extracting the full flavor from your first round of brewing with Fresh coffee grounds, you are perhaps not using a long enough brewing time.

Should I Remove Grounds From Cold Brew?

Yes, it is essential that you remove your grounds from your cold brew coffee, as if you fail to do so, they will continue to extract and eventually lead to an over extracted, over brewed coffee that tastes too bitter for you to enjoy.

Rather than using a regular coffee filter, use a metal filter or a fine mesh sieve to remove your grounds. Metal filters produce a much better result.

Can I Brew Coffee Grounds Twice?

Brewing coffee grounds twice will always result in a weak and watery tasting cup of coffee with a very diluted flavor and generally lacking the familiar coffee taste that you love and enjoy.

Can You Use Already Ground Coffee For Cold Brew?

Preground coffee can be used to make cold brew coffee. It is better if you grind your own to a coarse grind size for best results.

Can You Reuse Coffee Grounds For Iced Coffee?

Reusing coffee grounds to make an iced coffee or a cold brew coffee is not a good idea as the brewed coffee will taste weak, watery and severely lacking the coffee taste and flavor that you enjoy. Always use fresh grounds.

Final Thoughts – Can You Use Coffee Grounds Twice For Cold Brew?

The age-old question – can you use coffee grounds twice for cold brew, has been, in my opinion, definitively answered accurately, openly and, above all, honestly. 

I apologize on behalf of the other sites that may have misled you and deceived you into brewing a second cup and wasting your time. 

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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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