A similar slice of rich chocolate cake available in most cafes knocks up a staggering number of kilojoules, around 3500kj in fact. That's 1000kj more energy than anyone should be eating for a complete evening meal.
With less that one third the energy, half the fat and carbohydrate and more than double the amount of fibre, it makes sense, if you have a sweet tooth, to swap that unhealthy café cake for this healthy and delicious alternative.