An encrusted food is produced by a shutter device comprising a plurality of shutter pieces respectively pivotally supported on a plurality of pivots arranged along a circle, each of which comprises a pressure face facing to a center of the circle, a linkage setting the shutter pieces in motion synchronously so as to direct the pressure faces toward the center, and rake faces respectively formed on the pressure faces to stand upward from lower edges of the pressure faces and so dimensioned as to scoop up a periphery portion of the dough when the motion of the shutter pieces brings the rake faces into contact with the periphery portion.
