PROBLEM TO BE SOLVED: To provide a method for producing soybean curds, each of which has improved physical properties, or processed products thereof, and a preparation for modifying the soybean curds and the processed products thereof.SOLUTION: The method for producing soybean curds or processed products thereof comprises a step of using an oxidation-reduction enzyme and a metal and/or a metal-containing object. The oxidation-reduction enzyme to be used is glucose oxidase. The metal to be used is one or more selected from iron, zinc, magnesium and vanadium. The metal-containing object to be used is a metal-containing yeast. The metal-containing yeast is one or more selected from an iron-containing yeast, a zinc-containing yeast, a magnesium-containing yeast, and a vanadium-containing yeast.【課題】物性の改善された豆腐類又は豆腐加工品の製造方法並びに豆腐類及び豆腐加工品改質用の製剤を提供する。【解決手段】酸化還元酵素並びに金属及び／又は金属含有物を用いる豆腐類又は豆腐加工品の製造方法。酸化還元酵素がグルコースオキシダーゼであり、金属が、鉄、亜鉛、マグネシウム又はバナジウムから選択される１又はそれ以上の金属であり、金属含有物が金属含有酵母であり、金属含有酵母が、鉄含有酵母、亜鉛含有酵母、マグネシウム含有酵母又はバナジウム含有酵母から選択される１またはそれ以上の金属含有酵母である豆腐類又は豆腐加工品の製造方法。【選択図】なし
