A Baumkuchen baking machine comprising: an oven ; a batter container ; a roller capable of moving between a baking position for the oven and the batter container ; a camera adapted to photograph a portion of an outer peripheral surface of layered batter of a Baumkuchen on the roller ; and a control apparatus comprising: a computer adapted to control movement of the roller having layered batter of a Baumkuchen thereon from a batter application position for applying batter in the batter container to batter on the roller to the baking position for the oven and movement of the roller from the baking position for the oven to the batter application position, the computer being configured to perform: an image acquisition process for acquiring, from the camera , a group of images of the outer peripheral surface of the batter rotating together with the roller at the baking position for the oven , characterized by the group of images covering at least one entire turn; and a decision process for deciding on a point of time at which the roller is to be moved from the baking position for the oven to the batter application position based on a baked color of the outer peripheral surface of the batter indicated by the group of images of the outer peripheral surface of the batter at the baking position for the oven covering at least one entire turn; wherein the group of images contain information about the entire circumference of the outer peripheral surface of the batter of the Baumkuchen baked in the oven . an oven ; a batter container ; a roller capable of moving between a baking position for the oven and the batter container ; a camera adapted to photograph a portion of an outer peripheral surface of layered batter of a Baumkuchen on the roller ; and a control apparatus comprising: a computer adapted to control movement of the roller having layered batter of a Baumkuchen thereon from a batter application position for applying batter in the batter container to batter on the roller to the baking position for the oven and movement of the roller from the baking position for the oven to the batter application position, the computer being configured to perform: an image acquisition process for acquiring, from the camera , a group of images of the outer peripheral surface of the batter rotating together with the roller at the baking position for the oven , characterized by the group of images covering at least one entire turn; and a decision process for deciding on a point of time at which the roller is to be moved from the baking position for the oven to the batter application position based on a baked color of the outer peripheral surface of the batter indicated by the group of images of the outer peripheral surface of the batter at the baking position for the oven covering at least one entire turn; wherein the group of images contain information about the entire circumference of the outer peripheral surface of the batter of the Baumkuchen baked in the oven . an image acquisition process for acquiring, from the camera , a group of images of the outer peripheral surface of the batter rotating together with the roller at the baking position for the oven , characterized by the group of images covering at least one entire turn; and a decision process for deciding on a point of time at which the roller is to be moved from the baking position for the oven to the batter application position based on a baked color of the outer peripheral surface of the batter indicated by the group of images of the outer peripheral surface of the batter at the baking position for the oven covering at least one entire turn; wherein the group of images contain information about the entire circumference of the outer peripheral surface of the batter of the Baumkuchen baked in the oven . <EOS>