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Speaker 1: Welcome to brain Stuff from house stuff works dot com
Speaker 1: where smart happens. Hi, I'm Marshall Brain with today's question,
Speaker 1: what is a rice crispy? What is it made out of?
Speaker 1: And how do they make it? Rice crispies are an
Speaker 1: example of a puffed grain cereal, and the three puffed
Speaker 1: grains that you commonly see in the cereal aisle are rice, sweet,
Speaker 1: and corn. There are also a lot of puffed dose
Speaker 1: cereals in the United States. You see tricks kicks, cheerios,
Speaker 1: cocoa puffs, and so on. Puffing is a very common
Speaker 1: process in the breakfast cereal industry. In the case of
Speaker 1: a rice crispy, you pop the rice in a way
Speaker 1: similar to the way you pop popcorn. If you have
Speaker 1: read how popcorn works, you know that you need three
Speaker 1: things to make popcorn. You need moisture inside the kernel,
Speaker 1: starch inside the kernel, and a hard shell to contain
Speaker 1: the pressure. Normal rice is missing the moisture, but if
Speaker 1: you condition it with steam to get enough moisture inside
Speaker 1: the kernel, you can either oven pop rice or oil
Speaker 1: pop it. It's not as dramatic a transformation as popcorn,
Speaker 1: but it pops using the same mechanism. Rice crispies are
Speaker 1: oven popped, which gives them the right texture to snap, crackle,
Speaker 1: and pop when milk is added. Another common puffing method
Speaker 1: for rice, as in quake puffed rice, corn as in
Speaker 1: sugar pops, or wheat as in sugar smacks, is called
Speaker 1: gun puffing. You cook and condition the grain to get
Speaker 1: the right moisture inside, and then pressurize it too something
Speaker 1: like two s I. When you release the pressure instantly,
Speaker 1: the pressure stored inside the kernel puffs the kernel when
Speaker 1: the pressure is released. If you have ever heard of
Speaker 1: a cereal ad that talks about shooting the cereal out
Speaker 1: of a gun. This is what they're talking about. In
Speaker 1: the case of puffed dough, you can create tiny dough
Speaker 1: balls and then air pop those dough balls. If you
Speaker 1: heat a dough ball fast enough, the moisture in the
Speaker 1: dough flash boils and puffs the ball. A cereal like
Speaker 1: Captain Crunch, is extruded, cooked, cut, pressurized, puffed, and dried
Speaker 1: in a continuous process, which is why you can see
Speaker 1: that the ends of each piece look like they've been squeezed.
Speaker 1: That's an artifact from the cutting process. For more on
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