Sift and mix all the dry ingredients together into a medium mixing bowl.
Put the sugar and all the wet ingredients in a large mixing bowl and whisk together to mix well.
Pour the batter into a greased and floured 7″ or 8″ round cake tin.
Bake at 180C (350F) for about 50 minutes until the cake is done and a skewer pushed into the cake comes out clean. Let the cake cool in the tin for about 10 minutes, then unmould and cool it completely on a rack.
Serve it plain with coffee or tea, or dust the cake with powdered sugar, cover with a marmalade glaze or else drizzle with an orange juice and powdered sugar glace icing.