The present invention addresses the problem of developing a fat-processed starch which is excellent in terms of all of three properties, i.e., "workability during the preparation of a coating material for fries", "function required of coating materials for fries (adhesion to ingredients)", and "moderate slurry viscosity".This fat-processed starch is produced by a process comprising: a step in which a fat with which an emulsifying agent has been mixed is added to and mixed with a starch having a water content regulated to 25-45 mass%, in an amount of 0.02-0.4 mass% in terms of the weight of the fat excluding the emulsifying agent relative to the weight of the dry starch a step in which the mixture is controlled so that the water content is 0.2-0.5 times that of the starch to which the fat has not been added and a step in which the starch having a regulated water content is aged.
