Rosby Mthinda, who works with baobab growers in Malawi, with the superfruit fruit cake

The one-off cake is packed with pomegranates, blueberries, bananas, apples, carrots and most of all baobab, a 'superfruit' from Africa.

Baobab astonishingly offers, gram for gram, more calcium than milk, more iron than steak, more fibre than wholemeal bread and is six times richer in vitamin C than oranges.

For that reason, each serving (approximately 208g) of this mammoth fruit cake provides 59.9% RDA of Vitamin C, 47.8% RDA of potassium and 32.2% RDA of Vitamin A. It’s also low in saturated fat, low in salt and contains only naturally occurring sugars.

Is this the world's healthiest cake?