Retreived from a health and fitness website. It's supposed to work the same as Sunsweet "Lighter Bake" Oil & Butter Replacement: Making Your Own Fruit Puree The secret to fruit puree fat replacement -- the ingredient that makes low-fat cakes and cookies extra-rich and tender -- is lecithin. Lecithin is a naturally occurring substance found in corn, soybeans and egg yolks. Used as a commercial emulsifier and texture enhancer, it is a tremendous aid in creating healthful homemade baked goods. Look for granulated lecithin in health-food stores; keep it in the refrigerator. Per cup, homemade fruit puree fat replacement costs about 50 cents compared to $1.50 to $3.00 for the commercial product.