Prepare the baking tin by greasing and dusting it. Set aside. Preheat your oven.

Sift all-purpose flour and self raising flour into a mixing bowl. Add baking powder, baking soda and salt and stir to combine.

In a separate mixing bowl add the margarine, sugar and lemon zest and mix with an electric mixer until pale and fluffy, about 3-4 minutes.

Add the whole eggs and mix well. Stir in the vanilla.

Combine the dry ingredients into the wet ingredients as you fold in using a spatula.

Bake at 175 degrees C. for about 30 minutes or until toothpick inserted into center of the cakes comes out clean.

Remove from oven and allow to cool several minutes in the pans, then transfer to a wire rack to cool completely.

Serve and enjoy