Whole mandarin cake
Preheat oven to 180C.
Wash the mandarins and add them whole to a small saucepan. Cover with water and bring to the boil.
Gently simmer for 30 minutes, then drain and cool slightly.
Cut mandarins in half and puree in a food processor.
Add the melted butter, oil, eggs and sugar to the mandarin puree and process until combined.
Sift in the flour and baking powder and pulse until just combined.
Pour the batter into a greased and lined 20cm cake tin.
Bake in the oven for 50 minutes or until a skewer comes out clean.
Allow to cool in the tin for 15 minutes, then turn out onto a rack.
Once the cake has cooled, dust with icing sugar and scatter extra mandarin segments on top to garnish.