How to make:
- Heat the oven to 180°C/160°C fan/gas 4. Grease and line 2 x 20cm sandwich tins. Beat the butter, eggs and sugar until fluffy. Fold in the remaining cake ingredients with milk to loosen.
- Divide between the tins. Bake for 35-45 minutes until a skewer comes out clean. Cool in the tins briefly, then on a wire rack.
- For the icing, beat the butter and icing sugar with the zest, then beat in the cream cheese.
- Sandwich the cakes with half the icing, top with the remainder and decorate with walnuts.
Or change things up a bit with this carrot and parsnip cake with rose frosting.