Preheat your pateela for about 15 minutes

Combine the first three ingredients in a bowl, set aside

Use a mixing bowl to whip the oil, sugar and eggs together on high speed for about two minutes. The mixture will be a creamy pillowy yellow

Add the vanilla, beat for 30 seconds to combine

Alternately add the flour and milk to the bowl in two batches and mix until just combined.

Put a cup of the batter into a small bowl, add the 3 tbsp cocoa and 1 tbsp milk and mix until just combined.

The batter for this cake is thin, so carefully add it to the loaf pan, alternating between dollops of vanilla and chocolate batter

Use a long skewer or a knife to swirl the batter together

Bake for an hour or until a toothpick inserted in the middle comes out clean.

Serve with afternoon tea