Fruit puree is a processed fruit product that is made by heating, pressing, mashing, and sieving fresh fruit. A healthy substitute for cooking oils is the resulting creamy paste that is semi-liquid. Fruit purees are sometimes used in place of butter or oil by consumers trying to reduce their calorie intake. This can increase the flavor of the baked goods without adding any unhealthy trans fats. While certain fruit purees are pasteurized to reduce the microbial load, purees are often stored in the refrigerator to extend their shelf life. Since no juice or fibrous parts are left out throughout the process, fruit purees preserve all of the nutritious value of fresh fruits. Fruit seeds are typically removed during the processing stage, while some purees are also available with seeds.