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I’ve grabbed whole beans by accident on a quick grocery run more than once, and that is usually when I start looking for the least messy way to make them usable at home.
The other version of the problem is the grinder giving up after the beans are already home, which leaves you looking for a backup.
The good news is that there are a few ways around it.
So if your grinder is out of action, or you came home with the wrong bag, there’s still a way to make coffee.
I go through the main options below, from the quickest to the most hands-on.
6 Ways to grind coffee beans without grinder DIY
Pre-ground is the easiest shortcut.
But if you’re stuck with whole beans and no grinder, these methods can still get you to a usable grind.
1. Standard blender
Blenders have many uses, and while you might assume that your blender is only useful for making smoothies, this small kitchen appliance is actually great for grinding coffee beans.
A blender is the first workaround I reach for because it is quick and usually already in the kitchen.
It will not behave like a burr grinder, but for a few brew methods it can be close enough.
I add a small amount of beans, lock the lid, and pulse in short bursts. Long runs turn the coffee uneven fast, and I stop before it starts looking dusty.
If the blender has a grind setting, I use it. Otherwise I watch for a texture that looks even enough for the brew I am making.
Tilting the jug slightly can help move stray beans back toward the blades.
I also keep the batch small. Once the jug is crowded, the grind gets patchier, which is fine for drip coffee in a pinch but not something I would use for a more exact brew.
2. Food processor
A food processor feels similar, but the wider bowl gives the beans a little more room to move.
On pulse, it can produce a serviceable grind, though I still treat it as an emergency method rather than a replacement for a proper grinder.
I pour in a few scoops of beans and lock the lid before starting.
Then I pulse in short bursts. A slight tilt can help shift the beans around so the same few pieces are not getting hit every time.
The more I pulse, the finer the coffee gets, so I stop once the larger pieces have mostly disappeared and the grind matches the brew method I have in mind.
3. Rolling pin
A rolling pin is not my first choice, but it works when I need a coarse, usable grind and the other appliances are unavailable.
It takes more effort, and the result is less even, but it is still a workable backup.
I use a large cutting board plus a Ziplock bag or a sheet of parchment paper.
With a bag, I seal the beans inside and spread them out in a thin, even layer before rolling.
I start with a firm crush, then roll back and forth to break the bigger pieces down.
The main thing I watch is whether the texture is turning into a mix of large chunks and smaller grounds.
Done carefully, it can leave you with a coarse or uneven grind, which is more workable for some French press brewing than for pour-over.
4. Mortar & pestle
If there is a mortar and pestle in the kitchen, that is the backup I trust most for small batches.
It gives more control than the other hand methods, especially when I only need a small batch and do not want the beans scattered everywhere.
Don’t be surprised if you use a mortar and pestle once to grind your coffee and never go back to using an electric grinder.
Food and Nutrition points out that the mortar and pestle gets overlooked now that blenders, coffee grinders, and food processors are common.
That matches my experience. Hand-grinding takes longer, but it gives me more control when I only need a small batch.
I keep the mortar only about 1/4 full so the beans have room to move and break evenly.
With the pestle in my dominant hand, I press down firmly and crush the beans a little at a time until the texture looks right.
5. Hammer
A mallet, hammer or meat tenderizer can crush coffee beans too, but I treat this as the messiest option.
The main thing I watch is the surface underneath, because the tool can damage that as well as break the beans.
It usually leaves you with coarse fragments rather than anything fine.
At best, I end up around a medium grind.
For this method, I set out a hammer, mallet or tenderizer, plus a Ziplock bag and a sturdy cutting board.
I put the beans in the bag and press down on them rather than swinging hard.
A full-force hit is the fastest way to make a mess, or worse.
I work from the edges toward the centre so the beans break more evenly.
6. Knife
Using a kitchen knife isn’t the most ideal way to grind coffee beans, but you can definitely use a knife as a last resort.
I do not recommend the knife method. It is too easy for the knife to slip, so I would only treat it as a last resort.
If I am already down to that point, I would switch to a rolling pin or mortar and pestle instead.
A towel can keep beans from scattering, but it does not make this method safe enough for me to suggest.
In practice, I skip this one.
This cracks the beans first, then may leave a coarse to uneven medium grind. It can be usable for an immersion brew, but the inconsistent particles are less suitable for pour-over.
Why grind coffee beans when brewing coffee?
I would not try to brew whole beans the same way I brew ground coffee.
Without grinding, extraction during a typical brew is much slower and likely less complete, so the cup may taste weak or underdeveloped.
This is because the rich flavor of coffee is trapped within the whole bean coffee, and the only way to unleash it is by crushing the beans entirely – AKA, grinding beans into freshly ground coffee.
Grinding matters because it exposes more surface area to the water.
That extra contact gives water more opportunity to dissolve flavour and aroma compounds instead of leaving much of the coffee inaccessible inside larger pieces of bean.
Different types of coffee grinds (Does consistency matter?)
The grind size matters too, and that is where a lot of home methods fall apart.
A finer or coarser grind changes how the brewed coffee tastes and how quickly water can extract it.
Fine grinds suit some methods better, while coarser grinds fit others.
Here is the rough grind-size reference I use: coarse for French press and cold brew, medium for drip, medium to medium-fine for pour-over, and fine only when the recipe calls for it.
FAQs
Is it cheaper to buy coffee beans and grind yourself?
If you’re looking to save money in the kitchen, grinding your own beans is a great habit to get into. However, there are a lot of ground coffees that are affordable and even cheaper than some whole beans, but if you want the best taste and aroma, it’s best to grind your own.
Can you grind coffee beans in a Ninja blender?
Yep! You can grind coffee beans in any Ninja blender available. Just follow the steps for grinding with a standard blender.
Can you blend coffee beans in a Nutribullet?
Yes, it’s possible to use a Nutribullet to grind whole coffee beans. For the best results, you’ll need to remove the extractor blade, which is the one with 4 prongs, and replace it with the milling blade, which has 2 prongs.
Can you blend coffee beans in a Vitamix?
Yes. The company even offers exact steps on how to blend coffee beans in a Vitamix. Here’s the 3-step process according to the brand:
- 1To coarsely grind coffee beans in a Vitamix machine, attach the dry grains container and add the coffee beans.
- 2Select Variable Speed 1 and turn the machine on slowly, increasing the speed to Variable 8. Grind the coffee beans for 10 seconds.
- 3Use the ground beans in your favorite coffee brewing method, such as French Press or Pour Over. You can even brew iced coffee right in your Vitamix.
Conclusion
Once I have a workable grind, I stop chasing perfection and brew it with the method that fits it best.
If I do not have a grinder, I reach for a blender or food processor first. If those are not available, a mortar and pestle is the next method I would try, with a knife or rolling pin as the last-resort options.
