A Box Solar Cooker is basically an insulated box with a glass cover and a top lid which has a mirror on the inside to reflect sunlight into the box when the lid is kept open. The inner part of the box is painted black. Up to four black painted vessels are placed inside the box with the food to be cooked. The cooker takes 1 ½ to 2 hours to cook items such as rice, lentils and vegetables. The cooker has also been used to prepare simple cakes, roast cashew nuts, dry grapes, etc. It is an ideal device for domestic cooking during most of the years except the monsoon season and cloudy days. It however cannot be used for frying or chapati making.