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1
You will need a non-stick baking tin measuring 25.5cm x 15cm (10 x 6 inches) and 2.5 cm (1 inch) deep, the base lined with greaseproof paper.
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2
Preheat oven to gas mark 3, 325u00b0F, 170u00b0C.
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3
Begin by whisking the sugar, eggs and oil together in a bowl using an electric hand whisk for 2-3 minutes. Then sift the flour, bicarbonate of soda and the mixed spice into the bowl, tipping in all the bits of bran that are left in the sieve.
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4
Now stir all this together and then fold in the orange zest, carrots and sultanas.
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5
Pour the mixture into the prepared tin and bake on the centre shelf of the oven for 35-40 minutes, until it is well risen and feels firm and springy to the touch when lightly pressed in the centre.
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6
While the cake is cooking, make the topping by mixing all the ingredients in a bowl until light and fluffy, then cover with clingfilm and chill for 1-2 hours or until needed.
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7
Now you need to make the syrup glaze, and to do this whisk together the fruit juices and sugar in a bowl. When the cake comes out of the oven, stab it all over with a skewer and quickly spoon the syrup over as evenly as possible.
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8
Leave the cake on one side to cool in the tin, during which time the syrup will be absorbed.
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9
Then, when the cake is completely cold, remove from the tin. spread the topping over, cut into 12 squares and dust with a little more cinnamon.