Preheat the oven at 180 degrees and then grease your baking pan.

In your blender mix the eggs, vanilla and orange essence,oil, margarine, sugar,baking powder and buttermilk and beat till smooth.

In a bowl, mix oats and corn flour. Make a well and add in the your egg mix.

Mix well but do not over mix.

Pour the batter into your baking pan and bake at 180 degrees for 1 hour.