Abstract: A biscuit making oven comprises a fabricated chamber externally insulated and having bottom entry and exit openings for an endless conveyor arranged partly inside and outside of the oven. Inside the oven the conveyor has horizontal runs which carry the biscuits to be baked progressively down through the oven so that they encounter three stages of heating to perform different stages in the baking process. These stages of heating are independently controllable despite the absence of baffles in the oven. The oven has the advantage that it does not require to be constructed at site but can be factory fabricated and simply used at site.