From 絹漉(きぬご)し (kinugoshi) + 豆腐(とうふ) (tōfu). The tōfu changes to dōfu as an instance of rendaku (連(れん)濁(だく)).
きぬごしどうふ • (kinugoshi-dōfu) ←きぬごしどうふ (kinugosi-doufu)?