Puffed grain

Popcorn

Puffed grain includes ancient puffed grains like popcorn as well as puffed rice. Modern puffed grains are often created using high pressure.

High pressure puffed grain is created by placing whole grains under high pressure with steam. When the containment vessel's seal is suddenly broken, the entrained steam then flashes and bloats the endosperm of the kernel, increasing its volume to many times its original size.

Puffed rice or other grains are occasionally found as street food in China, Korea , and Japan, where pedlars implement the puffing process using an integrated pushcart/puffer featuring a rotating steel pressure chamber heated over an open flame. The great booming sound produced by the release of pressure serves as advertising to attract customers.

One aspect of puffing is its simplicity. For instance, the ingredients for puffed rice can be just rice and perhaps salt for taste. Other products like Rice Krispies or Corn Pops mix many ingredients into a homogeneous batter. The batter is then formed into kernel shapes and toasted. This causes them to rise, but not puff or pop.

Puffed grains are popular as breakfast cereals and in the form of "rice cakes". While it is easy to recognise that the cereals came from whole grains, the expansion factor for rice cakes is even greater, and the final product is somewhat more homogeneous.

Grains that can be puffed include:

• amaranth
• maize (popcorn)
• rice
• wheat
• millet
• barley

Non-grains that can be puffed include:

• soybeans
• makhana (a kind of water fruit)

Snacks and food products made from puffed grain include:

• Bhelpuri (rice)
• Cheese puffs (corn)
• Golden Crisp (wheat)
• Kix (breakfast cereal)
• Puffed rice (rice)
• Smacks (wheat)
• Toffee Crisp (rice)
• Wotsits (corn)
• Yuba (soy beans)

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