I have a question about the recipe "Detroit-Style Pizza" from Catherine Lamb. What size should the aluminum pan be?
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If you use an Internet search engine to seek out Kenji's recipe at Serious Eats
you'll find a hyperlink to an Amazon.com store item for an authentic Detroit pizza pan:
which measures 10x14 inches.
Alternatively, you can do as Catherine Lamb (and originally Kenji) suggest and use two 8x8" pans.