Carrot and walnut cake

Method

1. Heat the oven to 180C/fan160C/gas 4. Lightly oil and bottom-line 3 x 20-cm sandwich tins. Cream the butter and sugar together in a large mixing bowl until fluffy and light. Add the eggs one by one, beating well after each addition, then beat through the vanilla extract. Fold in the flour and baking powder with a pinch of salt, then fold in the mixed spice, coconut, sultanas, walnuts and carrot.
2. Divide the mixture between the tins, then bake for 20-25 minutes until risen, springy and a skewer pushed into the centres comes out clean. Leave to cool in the tins for 10 minutes, then turn out onto wire racks to cool completely.
3. Meanwhile, make the icing. Beat the butter and cream cheese together until smooth, then gradually beat in the icing sugar. Stir through the vanilla and lemon zest, then chill until ready to use.
4. To assemble the cake, put a cooled sponge on a serving plate (if it has risen a lot you may need to slice off the top or put the sponge upside-down), then spread over a thin layer of icing. Top with another sponge, then repeat with another layer of icing. Top with the third sponge, then use the rest of the icing to completely cover the cake. Decorate with the edible flowers (optional) and serve immediately.