Beat eggs in a bowl, add sugar, flour, oil, 160 ml of orange juice and baking powder. Mix all the ingredients into a smooth dough.
Pour the dough onto a baking sheet covered with baking paper. Bake it in a preheated oven at 185 °C for 20 minutes.
When the cake is baked, let it cool. In the meantime, prepare the sugar orange dressing.
Mix powdered sugar and 3 tablespoons of orange juice in a bowl to make a thick dressing. The sugar topping is spread over the top of the cake and can be decorated with crumbs or small candies as desired.
Instead of orange juice, we can also use lemon juice and prepare a lemon cake.