For the cake
- Preheat the oven to 150°C (130° fan) | 300F | gas.
- Grease and line an 18 cm | 7" round cake tin with greaseproof paper.
- Cut the marzipan into 1 cm | 0.5" cubes.
- Toss in a bowl with 2 tablespoons of flour.
- Sift the remaining flour into a large mixing bowl along with the baking powder and mixed spice.
- Add the butter, sugar, and eggs, beating thoroughly with an electric mixer until smooth, 3-4 minutes.
- Gently fold in the currants, sultanas, cherries, candied peel, ground almonds, milk, and citrus zest.
- Add the floured marzipan cubes and stir to incorporate thoroughly.
- Spoon the batter into the prepared cake tin.
- Cut out two 18 cm | 7" wide rounds of greaseproof paper, stack them on top of each other, and cut out a small 2.5 cm | 1" circle in the centre.
- Place the paper on top of the batter.
- Bake the cake for about 2.5-3 hours until risen and dry to the touch on top; a cake tester should come out clean from the centre.
- Remove the cake to a wire rack to cool. 9 Once cool, turn out from the tin.
- Horizontally cut in half with a serrated knife.
- Sit the bottom half on a cake stand.