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Rice Cooking Tips: Why You Should Ditch the Knuckle Method for Perfectly Cooked Rice

Posted on

October 19, 2024

by

Zojirushi America Corporation

Cooked white rice in a rice cooker

When it comes to cooking rice, many people have learned to use the knuckle method—a technique passed down from parents or grandparents. The idea is simple, and some of us have heard it before. After adding the rice to the cooker, place your index finger on top of the rice, and add water until it reaches the first knuckle.  

It’s a popular method that has seen a comeback recently. But is it really the best way to get the correct rice water ratio? 

At Zojirushi, we believe in precision, which is why we’re here to tell you that the knuckle method isn’t as accurate as you might think. Let’s break it down. 

 

What’s Wrong with the Knuckle Method? 

The biggest flaw with the knuckle method is that it’s not consistent. For starters, every person has different-sized hands. This means that the amount of water measured by your knuckle will vary greatly depending on the size of your finger. We did the math: 

  •      Large Hand: Measuring water up to the first knuckle in a large hand resulted in 360ml of water.
  •      Small Hand: The same knuckle measurement in a smaller hand resulted in 230ml of water.

That’s a 130ml difference, which is significant when it comes to cooking the perfect pot of rice! 

water in cups
Large hand is 360ml of water, while small hand is 230ml of water

 

We Put the Knuckle Method to the Test

To show that the knuckle method isn’t trustworthy, we did an experiment using our NS-LGC05 Rice Cooker. Here’s what we tested: 

  1. Two Different Hand Sizes: We used two people with significantly different hand sizes to measure the water using the knuckle method. 
  2. One Cup of Short Grain White Rice: Both participants measured water for the same amount of rice. 
  3. Control Sample: We compared the results to rice cooked using the accurate water measuring lines inside the Zojirushi rice cooker. 
index finger in a rice cooker pan with rice and water
Large hand on the left side, small hand on the right side

 

Here’s What We Found

  •      The large hand measured water that was closer to the 1.5 water line for white rice.
  •      The small hand-measured water closer to the 1 water line.

We then added the recommended water using the Zojirushi method, which involves measuring rice and water exactly to the line indicated inside the cooker. 

water line in rice cooker pan
Large hand on the left side, small hand on the right side

 

How Did the Rice Turn Out?

When we cooked the rice, the results were clear: 

  •      Large Hand Method: The rice was very soft and mushy, with no distinct grains. It was similar to dry rice porridge.

Mushy rice in a pan

  •      Small Hand Method: The rice was soft but still a little mushy, with more individualized grains than the large hand method, but still not perfect.

Mushy rice on a spatula

 

The Conclusion: Stick to Precise Measurements

Using the knuckle method for cooking rice may seem convenient, but as our test showed, it’s far from reliable. Water amounts vary wildly between different sized hands, resulting in inconsistent rice textures. It makes it easier to undercook or overcook rice with the water inconsistency as well. 

At Zojirushi, we’ve spent years fine-tuning our rice cookers to make sure they produce perfectly cooked rice every time. The water lines inside our rice cookers are there for a reason! We carefully calibrate them to provide the perfect water-to-rice ratio for each rice type. 

By using the water lines in your Zojirushi rice cooker, you can be confident that your rice will always turn out just right. So, next time you’re cooking rice, ditch the knuckle method! Rely on the precision of your rice cooker’s built-in water measurement system.  

Ready to Cook Perfect Rice Every Time? If you haven’t already, check out our full range of Zojirushi rice cookers, designed to take the guesswork out of cooking rice and ensure consistent, delicious results every time. Share your rice cooking moments with us on social media by tagging us on Instagram and Facebook. #Zojirushi #ZoFan 


Posted

October 19, 2024

in

From Zojirushi America

by

Zojirushi America Corporation

Tags:

perfect rice, rice, rice cooker, rice measurement, Zojirushi

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Comments

2 responses to “Rice Cooking Tips: Why You Should Ditch the Knuckle Method for Perfectly Cooked Rice”

  1. Ann Ostrowski Avatar
    Ann Ostrowski
    November 5, 2024

    I don’t understand the amount of rice to water ratio. I put in mixed grains rice 1cup rice to 1 3/4 water. Using the gaba setting the rice is still cooking 21/2 hours later? What is this
    Please send more accurate information about amounts of rice to water.

    Reply
  2. Not Really Avatar
    Not Really
    May 4, 2026

    Or course different sized hands are going to make a difference. Because the video you likely saw you the knuckle method one or the person who wrote the article you may have read likely doesn’t have large hands. An incredibly tiny amount of common sense goes a very long way here and one would have to be pretty thick to think otherwise.

    Let.me ask you this: would you watch an instructional video where a lady hems the shorts of her 5’5″ tall son and assume Yao Ming would use the same exact measurements? Of course not.

    Adjustments obviously have to be made according to one’s hand size. I’m 5’9″ with average sized hands from the tip of my thumb to the tip of my pinky with my hand stretched as far out as it can is about 11 inches. But my hand is bigger than the videos I watched and I made adjustments. They weren’t much bigger but I knew adjustments would have to be made. I don’t quite reach the first knuckle with my water and I make perfect rice the first time I tried it and nothing but since. I can cook worth a flip and rice was a definite nogo for me to do. Screwed it up every time.

    The finger method is only used as a gauge and nothing more when you don’t have the measurements like your cooker or a way to measure it the right way. And it works perfectly. You just have to have the realize things that should instantly be understood. It’s a way to gauge how much water you need without having to measure it because it’s the same depth above the rice every time, regardless of the amount of rice. Unless, of course you’re not using the correct pot to boil your rice in from the start. You don’t cook a cup of rice in a 5 gallon pot.

    mean if someone is missing part of their finger at the first knuckle, what does that tell us. For one, it use the finger on the other hand. But that same line of thought says using the first knuckle method when you finger starts at the first knuckle doesn’t mean you put barely any water over the rice. You adjust. The first knuckle method simply a

    Reply

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