Step 1

For the carrot cake, preheat the oven to 180C/170C Fan/Gas Grease and line a deep, 20cm/8in round cake tin with baking paper.

Step 2

Break the eggs into a large bowl, and lightly whisk using a fork. Add the vegetable oil and whisk again. Stir in the grated carrots, raisins, walnut pieces and orange zest.

Step 3

In a separate large bowl, sift together the flour, mixed spice, bicarbonate of soda and salt. Stir in the sugar. Add the wet carrot mixture to the dry ingredients and mix well to combine, making sure there are no pockets of flour.

Step 4

Spoon the cake batter into the lined tin and bake on the middle shelf for 1–1¼ hours, until the cake has risen and is golden-brown all over. Remove the cake from the oven and set aside in the tin to cool for 10–15 mins, then turn the cake out and leave to cool completely on a wire rack.

Step 5

While the carrot cake cools, make the frosting. Place the softened butter in a large bowl with the caster sugar, beat it for 2–3 minutes until light and creamy, then beat in the cream cheese until smooth.

Step 6

Place the cake on a serving plate or cake stand. Use a palette knife, or wide flat bladed knife, to spread the frosting over the top and sides of the cake. Scatter more walnuts on the top and serve.