A method of operating cooking appliance includes receiving, by a controller of the cooking appliance, an input indicating a time of a cooking operation. The method also includes activating a motor to rotate a turntable within a cooking cavity defined in a casing of the cooking appliance throughout the time of the cooking operation and activating a microwave module to deliver microwave energy into the cooking cavity during at least a portion of the rotation of the turntable. The method further includes varying at least one of a speed of the rotation of the turntable and a duty cycle of the microwave module during the cooking operation.