I've noticed that many 'chocolate' or 'cocoa' products, such as chocolate cake, chocolate milk and cocoa cereal contain fat-reduced cocoa powder rather than normal full-fat cocoa powder.
Often the products also contain added fat, so in these cases presumably fat-reduced cocoa powder isn't used in order to reduce the product's overall fat content.
Is fat reduced cocoa powder cheaper than full-fat cocoa powder? Or perhaps the fat in cocoa powder behaves differently from other fat, necessitating its replacement?