Preheat the oven to 160. Measure all ingredients. 3.brush tin with margarine and line bottom with parchment paper. 4. Mix and sieve dry ingredients. 5. Cream margarine and sugar till fluffy. Add vanilla. 6. Add eggs to cream mixture one by one. 7.fold in sifted dry ingredients until just combined. 8. Transfer to baking tin and bake for 40 mins or until inserted knife comes out dry