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Fibrous Greens Test for Personal Blenders

This green smoothie test aims to illuminate the efficiency of each personal blender when it comes to processing fibrous food.

By , , and ·Updated

This test is part of How We Test Our Personal Blenders v1.0

Today’s health-conscious consumers have fueled an ever-growing demand for nutrient-dense blended drinks. If you are a fan of green smoothies and think you need more fiber, you may want to know how efficient your personal blender is at processing leafy vegetables. This test will give you some practical answers.

Why The Test Matters

Our leafy smoothie gets its vibrant green color from kale, spinach, and celery. This particular recipe is very bitter, but our whole purpose here is to evaluate how well each blender handles vegetable fiber. The celery, in particular, should help differentiate the good blenders from the mediocre ones. 

When you actually go to make your own green smoothie, you’ll probably want to add a little fruit to sweeten your drink.

Simply put, this test is meant to be hard on the blenders. Any machines that produce perfect results will get a rousing recommendation from our team.

Testing Recipe: 1 Serving 

  • 1 oz kale 
  • 0.5 oz spinach 
  • 1 oz celery 
  • 1 cup water
Eight personal blenders standing on a table with a cup of water and three plates of fibrous greens, including kale, spinach, and celery, next to them.

Testing Procedure

We begin the test by cutting all the ingredients into 1-inch pieces, then placing them in the cup in the following order: spinach, kale, celery, and water. Initially, we thought it wouldn’t be necessary to cut our veggies into small chunks, but our trials on low-capacity blenders such as the Hamilton Beach suggested otherwise. Personal blenders often have narrow jars, so if you don’t cut ingredients small enough, there simply won’t be enough room for them to move around. You’ll end up with an undrinkable combination.

Our trials also indicated that 20 seconds worth of blending was enough to illuminate differences in performance. We run each blender at its highest speed for those 20 seconds and then filter its results through a mesh strainer. We then base our ranking on the particle size and amount of pulp that’s left behind. 

However, while we find it quite easy to visually distinguish between these pulp tailings, you may not agree. All the smoothies look roughly the same in photos, so we added an additional step. After straining out the pulp, we will hold each batch under running tap water. The steady stream of water washes smaller pulp particles out, leaving only the larger unblended solids. Finally, we put that remaining pulp into a glass of filtered water. That way, you can get a clearer perspective on each blender’s result. 

Scoring Scale

We put each blender through this test and give them scores on a 0-10 scale based on  their output. This score makes up 20% of the total performance score. 

Blended Result Score 

The blended result score was marked on a 10-point scale based on the pulp’s fineness. We found that we could categorize the pulp into four distinct variants: 

  • Very fine: 9.5-10 points 
  • Fine: 8 - 9 points
  • Coarse: 6 - 7.5 points
  • Very coarse: 5.5 points or less
A glass of water with fibrous green pulp produced by the Ninja Fit personal blender.
The Ninja Fit ended up with very fine pulp so we awarded it 10 points.
A glass of water with fibrous green pulp produced by the NutriBullet single-serve blender.
The NutriBullet produced fine pulp so it got 9 points.
A glass of water with fibrous green pulp produced by the Magic Bullet personal blender.
The Magic Bullet’s pulp is coarse so we allocated 6 points to it.
A glass of water with fibrous green pulp produced by the KOIOS personal blender.
The KOIOS left behind very coarse pulp, so it was worth only 5 points.
A glass of water with fibrous green pulp produced by the Hamilton Beach personal blender.
The Hamilton Beach didn’t do much in 20 seconds, leaving a bunch of large fibrous pieces. We awarded it no points.

Test Results

Test Developers

Headshot of Tina Pham
Tina PhamReviewer

Tina Pham is a staff writer and reviewer, with five years of experience in the industry. As a passionate amateur home cook, she loves to discover practical cooking solutions, and has made it her mission to bring her findings to every kitchen. Her ultimate goal is making cooking more of a pleasure for all.

Headshot of Lap Vo
Lap VoTest Lead

Lap is Head of the Research, Testing, and Review Team (RTR Team) at HealthyKitchen101.com, where he directs and supervises the testing of kitchen gadgets and appliances.

Headshot of Nguyen Ntk
Nguyen NtkVisual Specialist

Nguyen Ntk is a graphic designer, photographer, and videographer whose philosophy centers around respecting and celebrating the beauty of reality. Through his lenses, Nguyen strives to capture the true essence of objects and events, showcasing and highlighting authentic features without distortion or exaggeration.

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