An outdoor cooking machine including a combination of horizontal and vertical smoker/grills. A vertical smoker/grill is connected to a horizontal smoker/grill by a tube with a damper. A variety of outdoor cooking techniques are provided, singly or in combination, by the outdoor cooking machine. Among these cooking techniques are: cold/slow smoking, hot smoking, steaming, double boiling, deep frying, stewing, food warming, spit/rotisserie cooking, conventional grilling, baking, an open firepit function, an outdoor fireplace function, and a tabletop function. Some cooking techniques use a single fire while others combine multiple fires from one or more smoker/grills to enhance and/or change cooking options.