Rich, small, delectable and adorable. They taste like a Mars-bar flavoured chocolate crackle. I made these for my son's 5th birthday party and the kids (and adults) loved them. The recipe is from the Women's Weekly Cupcake book which I adapted for mini muffins. Edited to add: I recently made these as normal cupcake-sized muffins and it was much faster and more convenient to make them in this way.