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A wafer is a thin, crisp cake, candy, or cracker. It can also refer to a round, thin piece of unleavened bread used in the Eucharist. Historically, wafer bread has also been described as corn bread baked in thin sheets.12

In baking, cookies can be shaped by die forming and extrusion. This process can create drop-type cookies, such as vanilla wafers, by depositing portions of dough. The term "wafer" can also describe a thin slice of semiconductor material used in electronics.31

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