Why Do Rice Cookers Boil Over?

In this brief guide, we will answer the query, “Why Do Rice Cookers Boil Over?” and will discuss how to prevent a boil over in a rice cooker.

Why Do Rice Cookers Boil Over?

Rice cookers boil over because of the starch present in the rice. During the process of boiling rice, the water boils and combines with starch, resulting in enormous bubbles and expanding the rice cooker to its maximum capacity. Overly-starchy rice might also lead to a scalding of the pot.

What are Rice Cookers?

Cooking rice in a rice cooker is exactly what it sounds like: cooking rice. But it goes a bit deeper than that. Slow cookers and Crock-pots are examples of tiny kitchen equipment that are similar to rice cookers. Once the rice cooker’s basin has been filled with water and rice, a heating mechanism within the container gets the water to a boil.

The rice soaks up the boiling water and turns it into a nutrient-dense meal. Using this method, the rice is well cooked! Cooking rice over 212° (Fahrenheit) usually results in burned or overcooked rice. It’s a good thing that most rice cookers include a sensor that prevents the rice from being overcooked. Because it keeps the rice from burning or overcooking, yet it’s still hot enough to keep germs from developing or sticking to it, this is a win-win situation.

Reasons for boil over in a rice cooker

The rice itself, not the rice cooker, is the primary cause of rice cookers boiling over, as we briefly discussed before. If the rice you’re cooking has too much starch, your rice cooker will overflow. It’s difficult to avoid rice since it’s inherently starchy. Excess starch may be eliminated from rice to prevent the rice cooker from overheating.

If the rice in a rice cooker has too much starch, the boiling water will react with it and produce soapy, frothy bubbles. These bubbles rise to the top of the rice cooker, causing it to spill its contents as it comes to a boil. It is possible that the rice cooker may overflow and develop into an unpleasant “soupy” porridge as the starch and water continue to combine.

Too much water in the cooker’s basin may cause the rice cooker to boil over. Rice’s starch and water content make for a poor mix. Knowing the maximum amount of water that can be put in the basin is critical, as is making sure there isn’t any!

How to Keep Your Rice Cooker from Boiling over?

You now understand how a rice cooker works and the most common causes of a boiling-over rice cooker incident. That leads us to our next (and most crucial) topic: how to keep your rice cooker from boiling over completely. Fortunately, there are many ways to keep your rice cooker from overheating.

You may enjoy your rice cooker and your rice without worrying about “rice porridge” or a mess caused by boil overs by following one of the most helpful tips.

  • Before cooking your rice, be sure to wash it well.

Keeping your rice cooker from boiling over is easy when you follow this simple technique. The extra starch from the rice may be removed by washing it before putting it in the rice cooker. In order to avoid a boil-over, make sure to remove any extra starch from your rice before putting it in the rice cooker in the first place.

Before cooking, how should the rice be cleaned?

There are many ways to wash rice before cooking, yet no one technique has been proved effective. It’s possible that you’ll wash your rice differently or that one technique works better than the other. As a result, we’ll show you how to wash rice using a simple technique.

Instructions for Washing Rice

You’ll need the following items to wash your rice:

  • Rice
  • a dish (large or mixing size)
  • a colander or sieve for draining rice
  • Coldwater
  1. Put the rice in the bowl and stir it well.

The first step in washing your rice is to put it in a bowl with water. Use a big bowl so you have space to add water while stirring the rice.

  1.  Fill a bowl with water and add the rice to it.

After that, add water to the rice and let it sit for a few minutes. You are free to use bottled water or even tap water. No matter how chilly your water is, it’s better if it’s below room temperature or heated than neither. Make sure the rice is fully submerged in water in the bowl. If you’re looking for a formula, try adding three times as much water to the rice as you normally would.

  1. Stir the Rice with Your Hands

After that, wash your hands well since you’ll be handling things with them soon. Stir the rice with your hands after washing them. Toss the rice around with your hands, using gentle pressure. Alternatively, you may pick up the rice and move it. Starch is removed from rice by rubbing it against other grains of rice, palms, and water.

  1.  Remove the Starchy Water from the Mixture and Discard It

It’s now time to remove part of the starchy liquid. Alternatively, you may dump the water from the bowl directly into the sink or into another bowl. The starchy water may be used in other recipes if desired.

It will sink to the bottom of the bowl since rice is not buoyant. Stop the rice from being sucked out with the water by holding it back with your palm. Notice how milky and murky the water looks when it’s squirted out.

The starch has escaped from your rice, which is a wonderful thing!

  • Poke a Hole in the Rice with a Fork

After you’ve drained as much water as possible from the rice, use your palm to gently “punch” the rice in the bowl. Repeat this process a few times to get the hang of it. This will cause the rice to brush against each other once again, removing even more of the starch.

Rinse and repeat. Pour additional water into the bowl after you’ve “punched” the rice many times, and then do it all over again. Rinse and repeat this procedure until the water you’re about to pour out is clear.

  • Soak the rice in water for at least 30 minutes (Optional)

Finally, transfer the rice to the colander or strainer and set it aside. Allow the rice to “soak” for approximately thirty minutes if you want. This step is optional. Shortening the cooking time of your rice by soaking it in a colander may help.

Click here to learn a simple rice recipe in a rice cooker.

Other FAQs about Rice cooker that you may be interested in.

How does the rice cooker work? 

Can I cook wild rice in a rice cooker?

How does a rice cooker know when the rice is done?


In this brief guide, we answered the query, “Why Do Rice Cookers Boil Over?” and discussed how to prevent a boil over in a rice cooker.



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