Mary Berry make a delicious whole spiced orange cake on The Great British Bake Off Masterclass.

Mary says: “A whole orange is boiled and puréed to make a rich marmalade-y cake which is lightly spiced and decorated with curls of orange rind. Add a little more spice if you want it to be very spicy.”

The ingredients for the cake: 1 small, thin-skinned orange (such as Valencia), 275g self-raising flour, 2 tsp baking powder, 275g caster sugar, 275g baking spread, from the fridge, 4 free-range eggs, 1 tsp ground cinnamon and 1 tsp mixed spice.

For the orange icing: 50g butter, softened, 175g icing sugar, sieved, 250g full-fat mascarpone cheese and 2 tbsp orange pulp, reserved from above.