I had this cake when I was in Lisbon for Web Summit. I just had to make it.
500g sugar
50g corn flour
15g baking powder
2 large oranges (zest and juice)
12 eggs
Preparation:
Add the solid ingredients – sugar, flour and baking powder – and mix well.
Add the zest and juice of the oranges and stir.
Finally, add the eggs and beat well.
Grease a rectangular baking pan and line with greaseproof paper. Pour mix in.
Cook in a bain-marie in a preheated oven at 220C/200C fan oven for 20-25 minutes until well set.
Sprinkle sugar on a clean tea towel. Flip cake onto the tea towel, remove the paper lining and roll while still warm.