Once you get a homogeneous mixture, add 1 small tsp each of finely grated orange and lemon zest.
Pour in the orange juice and stir.
Set aside 1 cup of the mixture and stir the cocoa in it.
In a greased and sprinkled with cocoa form, pour in the white mixture and then the brown one.
Bake in a preheated 356°F (180 °C) until dry on the inside.