Softened butter with the sugar mix of fluffy cream, add the eggs one by one, then the juice of one orange and lemon, grated peel them, mix until a homogeneous mixture. Add the flour, starch and baking powder and kneaded. The finished mixture is poured into a pan, oiled and sprinkled with flour. Bake in a moderate oven. During baking, prepare glaze of powdered sugar and the juice of the remaining lemon and orange. Stir until melted sugar. Still warm, pour the cake with this glaze, sprinkle with lemon peel and orange and leave to cool. Above is obtained crispy crust. Cuts are completely cool.