1: Preheat the oven to 180°C.
2: Mix together dry ingredients.
3: Pour in the wet ingredients and stir until just combined but smooth.
4: Line a loaf tin and pour in the mixture.
5: Bake in the oven for 35-40 minutes, checking with a toothpick towards the end.
6: Once done, leave the cake to cool completely.
7: Mix the icing ingredients together and pour over the cake once cooled.
8: Finish with a final dusting of chopped walnuts.
