Posted By Dr. Mercola
To understand the nature of Pringles and other stackable chips, forget the notion that they come from actual potatoes in any recognizable way. The Pringles company, in an effort to avoid taxes, once even argued that the potato content of their chips was so low that they are technically not even potato chips.
The process begins with with a slurry of rice, wheat, corn, and potato flakes that are pressed into shape. This dough-like substance is then rolled out into an ultra-thin sheet cut into chip-cookies by a machine.
According to io9:
“The chips move forward on a conveyor belt until they're pressed onto molds, which give them the curve that makes them fit into one another. Those molds move through boiling oil ... Then they're blown dry, sprayed with powdered flavors, and at last, flipped onto a slower-moving conveyor belt in a way that allows them to stack. From then on, it's into the ... and off towards the innocent mouths of the consumers.