1. Beat butter and sugar till fluffy. 2. Add in eggs 1 at a time, beating in. 3. Add flour, salt, baking powder and rind, then add in milk and beat. 4. Grease and line a loaf tin. 5. Bake in preheated oven at 180 degC for 4 minutes then reduce to 160 degC till done (+/-25min) until goldfn and cracked on top and when knife inserted comes out clean.
Please note: that this is not a sponge cake, it is a traditional madiera cake that dips well in tea.