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." The fat-processed starch of the present invention is produced by a process comprising the steps: adding a fat with which an emulsifying agent has been mixed to a starch having a water content adjusted to 25 to 45 mass%, in an amount of 0.02 to 0.4 mass% in terms of the weight of the fat excluding the emulsifying agent relative to the weight of dry matter of the starch, and mixing the fat and the starch adjusting the water content of the mixture is 0.2 to 0.5 time that of the starch before the addition of the fat and aging the starch having the adjusted water content.
