WEBVTT - What is a rice krispy?

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<v Speaker 1>Welcome to brain Stuff from house stuff works dot com

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<v Speaker 1>where smart happens. Hi, I'm Marshall Brain with today's question,

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<v Speaker 1>what is a rice crispy? What is it made out of?

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<v Speaker 1>And how do they make it? Rice crispies are an

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<v Speaker 1>example of a puffed grain cereal, and the three puffed

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<v Speaker 1>grains that you commonly see in the cereal aisle are rice, sweet,

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<v Speaker 1>and corn. There are also a lot of puffed dose

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<v Speaker 1>cereals in the United States. You see tricks kicks, cheerios,

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<v Speaker 1>cocoa puffs, and so on. Puffing is a very common

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<v Speaker 1>process in the breakfast cereal industry. In the case of

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<v Speaker 1>a rice crispy, you pop the rice in a way

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<v Speaker 1>similar to the way you pop popcorn. If you have

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<v Speaker 1>read how popcorn works, you know that you need three

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<v Speaker 1>things to make popcorn. You need moisture inside the kernel,

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<v Speaker 1>starch inside the kernel, and a hard shell to contain

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<v Speaker 1>the pressure. Normal rice is missing the moisture, but if

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<v Speaker 1>you condition it with steam to get enough moisture inside

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<v Speaker 1>the kernel, you can either oven pop rice or oil

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<v Speaker 1>pop it. It's not as dramatic a transformation as popcorn,

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<v Speaker 1>but it pops using the same mechanism. Rice crispies are

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<v Speaker 1>oven popped, which gives them the right texture to snap, crackle,

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<v Speaker 1>and pop when milk is added. Another common puffing method

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<v Speaker 1>for rice, as in quake puffed rice, corn as in

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<v Speaker 1>sugar pops, or wheat as in sugar smacks, is called

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<v Speaker 1>gun puffing. You cook and condition the grain to get

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<v Speaker 1>the right moisture inside, and then pressurize it too something

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<v Speaker 1>like two s I. When you release the pressure instantly,

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<v Speaker 1>the pressure stored inside the kernel puffs the kernel when

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<v Speaker 1>the pressure is released. If you have ever heard of

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<v Speaker 1>a cereal ad that talks about shooting the cereal out

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<v Speaker 1>of a gun. This is what they're talking about. In

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<v Speaker 1>the case of puffed dough, you can create tiny dough

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<v Speaker 1>balls and then air pop those dough balls. If you

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<v Speaker 1>heat a dough ball fast enough, the moisture in the

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<v Speaker 1>dough flash boils and puffs the ball. A cereal like

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<v Speaker 1>Captain Crunch, is extruded, cooked, cut, pressurized, puffed, and dried

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<v Speaker 1>in a continuous process, which is why you can see

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<v Speaker 1>that the ends of each piece look like they've been squeezed.

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<v Speaker 1>That's an artifact from the cutting process. For more on

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<v Speaker 1>this and thousands of other topics, visit how staff works

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