Mazzer ZM Plus: A Deep Look at Mazzer's Premium Flat Burr Grinder

The Mazzer ZM Plus is a prosumer flat burr grinder that sits near the top of Mazzer's home and low-volume commercial lineup. It uses 83mm flat burrs, has digital dosing controls, and runs on a powerful motor designed for quiet, cool operation. If you've been eyeing this grinder, you're probably trying to figure out whether it justifies its $2,000+ price tag. I think it does for a specific type of coffee drinker, but not for everyone.

I'll break down what makes the ZM Plus different from other Mazzer models, how it performs for espresso and filter, what the daily experience is like, and who should seriously consider buying one. I'll also cover the areas where it falls short, because at this price you deserve the full picture.

Design and Build

The ZM Plus shares Mazzer's industrial Italian design language. It's built from cast aluminum with a matte finish, and it feels like a piece of commercial equipment sitting on your counter. Weight is substantial at around 20 pounds, which keeps it planted during operation.

The form factor is taller and narrower than grinders like the Niche Zero or the DF64. It has a small footprint considering the 83mm burrs inside, which is a nice engineering achievement. The hopper holds about 400 grams, and the adjustment dial sits behind the hopper with a digital display on the front.

The Digital Interface

Mazzer's digital panel on the ZM Plus lets you set two programmable dose times. You press one button for a single dose, another for a double. The display shows the elapsed grinding time, and you can fine-tune in 0.1-second increments. It's simple and functional without being overcomplicated.

Compared to something like the Eureka Atom or the Ceado E37S, the Mazzer interface is less flashy but perfectly usable. I prefer this approach. I don't need a touchscreen or Bluetooth on my grinder. I need a button that dispenses my dose accurately.

The 83mm Burrs

This is where the ZM Plus earns its keep. The 83mm flat burrs are significantly larger than the 64mm burrs found in most prosumer grinders. Larger burrs mean faster grinding, less heat generation, and more uniform particle distribution.

Flavor Profile

The stock ZM Plus burrs produce a cup with good clarity and sweetness. They're not quite as clean as SSP burrs in the same size, but they're well above average for factory burrs. Espresso shots have defined origin characteristics, good body, and balanced acidity. Filter coffee comes out clean with nice sweetness.

The 83mm size gives you access to the SSP aftermarket world if you ever want to upgrade. SSP makes 83mm burrs in High Uniformity, Multi-Purpose, and other geometries. Dropping a set of SSP HU burrs into the ZM Plus is a popular modification among specialty coffee enthusiasts, though it voids the warranty.

Grinding Speed

The ZM Plus grinds a standard 18g espresso dose in about 4-5 seconds. That's noticeably faster than 64mm grinders, which typically take 8-12 seconds for the same dose. In a home setting, the time savings per shot is minor. In a small cafe doing 50+ drinks a day, those seconds add up.

The motor runs at a relatively low RPM, which reduces heat buildup and preserves volatile aromatics. After grinding 10 consecutive doses, the exit temperature of the grounds stayed within a few degrees of ambient in my testing. That matters if you're pulling back-to-back shots during a dinner party or small event.

Espresso Performance

For espresso, the ZM Plus is excellent. The stepless adjustment provides infinite precision for dialing in. I can make micro-adjustments that shift my shot time by 1-2 seconds, which is the level of control you want at this tier.

Shot-to-shot consistency is where the ZM Plus really shines. Once dialed in, I can pull 5 shots in a row and get extraction times within a 1-second window. That consistency comes from the uniform particle distribution of the 83mm burrs combined with Mazzer's tight manufacturing tolerances.

Retention is about 1-1.5 grams, which is typical for a flat burr grinder with a traditional exit chute. If you're strict about single-dosing, you'll want to add a bellows or modify the workflow. Some users purge with a quick pulse before each dose. I keep the hopper loaded and purge 2-3 grams into a knock box before my first shot of the day.

Filter Coffee

The ZM Plus handles filter grinds better than I expected from a grinder marketed primarily for espresso. The adjustment range extends coarse enough for most pour-over methods. V60, Kalita Wave, and Chemex all produce good results.

The cup quality for filter is clean with good sweetness, though not quite at the level of a dedicated filter grinder with SSP HU burrs. If you primarily drink filter coffee and only occasionally pull espresso, there are better options at this price point. But as a primarily espresso grinder that can also do quality filter, the ZM Plus handles the dual role well.

If you're exploring Mazzer's lineup, our Mazzer Omega pricing guide covers another popular model worth considering.

Noise and Daily Use

The ZM Plus is not quiet. It's not obnoxiously loud either, but it's a step up from something like the Eureka Mignon Silenzio. I'd put it at about 70-75 decibels during operation. You can have a conversation over it, but you'll need to raise your voice slightly.

Workflow

My daily routine with the ZM Plus:

  1. Weigh 18g of beans
  2. Drop into hopper (I single-dose despite the hopper)
  3. Press the single-dose button
  4. Grinding finishes in about 4 seconds
  5. WDT the grounds in the portafilter
  6. Tamp and pull

Total time from beans to espresso: about 90 seconds. The speed of the 83mm burrs makes the whole process feel effortless.

Maintenance

The top burr carrier removes easily for cleaning. I brush it out weekly and run cleaning tablets monthly. The 83mm burrs should last 1,000+ pounds of coffee for a home user. At 20 grams per day, that's over 60 years, so you'll never need replacement burrs in a home setting.

How It Stacks Up Against Competition

At the $2,000-$2,500 price point, the ZM Plus competes with:

  • Ceado E37S: Similar 83mm burrs, slightly different geometry. Very comparable performance. The Ceado has a more modern look.
  • Lagom P64 with SSP: 64mm burrs but premium SSP from the factory. Better for filter, slightly behind the ZM Plus for espresso speed and consistency.
  • Weber Key: A design showpiece with 83mm burrs and exceptional build. About twice the price.

The ZM Plus offers the best value per dollar in the 83mm flat burr category, in my opinion. The Ceado is the closest competitor, and choosing between them often comes down to aesthetics and local availability. For a broader comparison, our best coffee grinder roundup includes options across all price ranges.

FAQ

Is the Mazzer ZM Plus good for home use?

Yes, if you're serious about espresso quality and willing to invest at this level. It's larger and louder than typical home grinders, so make sure you have counter space and tolerant household members. The 83mm burrs produce noticeably better results than most 64mm home grinders.

Can I use SSP burrs in the Mazzer ZM Plus?

Yes. SSP makes 83mm flat burrs that fit the ZM Plus. The High Uniformity set is popular for filter-focused users, and the Multi-Purpose set works well for espresso. Budget about $200-300 for the SSP upgrade. Keep in mind this voids your Mazzer warranty.

How does the ZM Plus compare to the Mazzer Mini?

They're in completely different leagues. The Mini uses 64mm flat burrs, has a doser (on the classic model), and costs about $600-800. The ZM Plus uses 83mm burrs, has digital dosing, and costs three times as much. The grind quality difference is significant, particularly in consistency and flavor clarity.

What's the difference between the ZM and ZM Plus?

The ZM Plus has an updated digital interface, improved motor, and slightly redesigned burr chamber compared to the original ZM. Grind quality is similar, but the Plus model is quieter and the dosing timer is more precise. If buying new, the Plus is the one to get.

Bottom Line

The Mazzer ZM Plus is a serious grinder for serious coffee people. The 83mm flat burrs deliver grind quality and speed that 64mm grinders simply can't match. Build quality is commercial-grade. The digital interface works without getting in the way. At $2,000+, it's a significant investment, but for daily espresso with the option of quality filter grinding, the ZM Plus delivers performance that matches its price. If you're spending this much, though, seriously consider ordering a set of SSP burrs alongside it for the best possible results.