A baked good marking device assembly comprises a base, an elongated marking arm, and a marker. The base has a top surface and a bottom surface. The elongated marking arm is generally perpendicular to the base. The elongated marking arm has a first side and a second side. At least one of the first side and the second side includes one of either a first channel and a first rail. The elongated marking arm has measuring indicia proximate the one of either the first channel and the first rail. The elongated marking arm is removably fixed to the base. The marker has a body portion. The marker is moveable along the first channel or the first rail of the elongated marking arm. The marker has a marking portion protruding outward from the body portion. The marking portion is disposed in a generally perpendicular relationship to the elongated marking arm.