-
Preheat the oven to 350°C.
-
Grease a large pan or two smaller ones and line with waxed paper. Grease the paper and coat with a corn flour and sugar mixture.
-
Whisk egg yolks, adding half the sugar gradually until light coloured and creamy.
-
Add oil, orange juice and orange zest and beat again.
-
Whisk egg whites until very light and forms soft peaks.
-
Add the other half of sugar gradually beating on medium to high speed.
-
Add corn flour, flour, salt and baking powder gradually to the egg yolks, beating all the while.
-
Gently fold in the egg whites with a rubber spatula until well mixed.
-
Spoon the mixture into the pan and bake for 35- 45 minutes until brown.
-
A toothpick inserted into the center should be clean and the midlle should spring back when touched.