Preheat oven at 150 degrees Celsius

Spray your cake mold with some oil and dust it with flour

Beat eggs, vanilla and sugar, untill double in size

Add vegetable oil, and orange zest while beating

Mix flour and baking powder together, then add to egg batter

Add orange juice beat for 5 minutes

Pour the batter in cake mold, and bake between 50 to 60 minutes (depending on your oven)

At minute 50 you can check your cake by entering toothpick in the middle