Christmas cake icing

Mary Berry’s been making her traditional Christmas cake christmas cake icing for as long as Paul Hollywood’s been alive. She knows what she’s talking about. If you don’t have the required tin size, go to her cake calculator to recalculate the ingredients and cooking time for your cake tin.

9in deep, round tin with a double layer of greased greaseproof paper. Add the flour and ground spice and mix thoroughly until blended. Spoon into the prepared cake tin and level the surface. Check after two hours, and if the cake is a perfect colour, cover with foil.