The White Castle System of Eating Houses - 99% Invisible
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White Castle has its own take on fast food hamburgers. For starters, the patties are square, with five holes in each patty. And they’re small, too –- two-and-a-half inch sliders. Just big enough to fit into the palm of your hand. And since they’re steamed on a bed of onions, everything is infused with this

Excellent listen throughout, but you can skip to 17:30 for competition with McDonalds.