Our personal Blender performance TestProtein Shake


People love personal blenders for their portability and convenience when it comes to preparing portioned nutrient-dense blends. That’s why even when there are various tasks that can help us point out the value of a personal blender, the test of making protein shake is presumed to be the most effective one.

Protein Shake Test

Why The Test Matters

Our milkshake consists of protein power, dried blueberries, oatmeal, almonds, and sugar-free milk. We use whole grains and raw nuts instead of fresh fruits or root vegetables as such ingredients are harder so they will add complexity to the process, thus driving us to a clearer picture of the blender’s efficiency. Through this test, you can determine how long each blender takes to yield a serving of milkshake, how easy it is to use, and how smooth the resulting drink will be. 

Testing Recipe: 1 Serving

  • 6 tbsp protein powder  
  • 0.75 oz oatmeals  
  • 1 oz almonds  
  • 0.5 oz dried blueberries 
  • 1 cup whole milk

This protein shake recipe is a healthy breakfast option for those short on time in the morning. It is designed nutritionally balanced, providing a right combination of protein, healthy fats, and fiber, but you can tailor it to fit your specific tastes and preferences.

Protein Shake Nutrition Facts

Testing Procedure

We make one serving of protein shake by adding all the ingredients into the cup, then blending until they are visually smooth. After that, we use a spoon stirring it back and forth to check for the texture. If all oatmeal  hasn’t been completely liquified, we will operate the blender for an additional time. The process ends when it completely breaks this ingredient down into liquid form. 

We consider silky-smooth oatmeal a compulsive requirement for a pass rather than other ingredients because if oatmeal doesn’t mix well into the mixture, your drink will come out very grainy and lumpy, making it not pleasant to drink. Meanwhile, our real-world experiences suggest that if a blender has processed oatmeal entirely, it almost reaches its perfection. At that point, there may be just a small amount of residual solids remaining, and this result is acceptable for most fitness enthusiasts. 

Since we cannot make sure where an appropriate point of the silky-smooth oatmeal is in a span of the additional blending time, we will stop each machine temporarily after every 10-20 second intervals (depending on remaining residual amounts) checking for its texture. That way, we can ensure the most accuracy and objectivity when it comes to the conclusions.  

Note that we don’t set a specific blending duration for our blenders as each of them comes with different power ratings. Not only that, but that way will also significantly reflect the overall efficiency of each blender, thus being more practical to our recommendations. We believe you may want to know about the blender’s final outcomes rather than how it performs in a certain amount of time.

Scoring Scale

We allocate 40% of the total score to this test. Each blender performance is ratedon a 0-10 scale and qualified to pass the test only when it completely liquifies oatmeal. Our scoring factors include the Blending Time (70%), Blended Almond Results (15%), and Blended Blueberries Results (15%). 

The smoothies' flavor doesn’t contribute to that score since we use the same recipe for each test, which should ensure roughly the same taste. 

Blending Time Score (70%)

The blending time score is assigned based on how long each blender took to complete its task, which is also known as the actual time it spends in crushing oatmeal. We weight this score the highest percentage (up to 70%) of the final score because it indicates the blender’s result clearer, given that when oatmeal is liquified entirely, the milkshake is almost ready to drink. 

And to determine the scoring breakdown, we keep track of the amount of time reasonable for blending protein shake, then compare them all together and devise a scoreboard with the fastest time among all blenders to be the benchmark for maximum points. 

Here’s how our scoring breakdown is designed:

  • ≤ 40 seconds: After a course of hands-on testing, we noticed that the fastest blenders could get the job done in only 40 seconds, so we decided to set this time frame to be the benchmark for 10 points. 
  • ≤ 50 seconds: 9.5 points
  • ≤ 1 minute: 9 points
  • ≤ 1 min 10 secs: 8.5 points 
  • ≤ 1 min 20 secs: 8 points 
  • ≤ 1 min 30 secs: 7.5 points 
  • ≤ 1 min 40 secs: 7 points 
  • ≤ 1 min 50 secs: 6.5 points 
  • ≤ 2 mins: 6 points 
  • ≤ 2 mins 10 secs: 5.5 points 
  • ≤ 2 mins 20 secs: 5 points
  • ≤ 2 mins 30 secs: 4.5 points
  • ≤ 2 mins 40 secs: 4 points
  • ≤ 2 mins 50 secs: 3.5 points
  • ≤ 3 mins: 3 points

Blended Almond Result Score 

To determine this score, once the blender finishes blending oatmeal, we drain its milkshake through a mesh strainer and then calculate points accordingly to the shape, size, and amount of trapped chunks. 

* For example: 

NinjaFit Protein Shake 10 points
We awarded 10 points for the NinjaFit since it left behind with almost no partially unblended almond chunks.
KOIOS Protein Shake 9.5 points
The KOIOS ended up with a few unblended almond chunks, so it was worth 9.5 points.

Blended Blueberries Result Score 

For this particular score, we also check for the shape, size, and amount of unblended blueberries left out after straining and then award points accordingly. So, a blender that ends up with larger chunks would most likely have a lower score. 

* For example: 

Nutri Ninja allocated 9.5 points
There is a small amount of unblended dried berries in the Nutri Ninja’s milkshake, so we allocated 9.5 points to it.
Magic Bullet 0 points
Most of the blueberries came out completely intact, causing the milkshake to look extremely grainy, so we gave the Magic Bullet 0 points in this case.