First, preheat the oven at 180℃ (356℉). Also, rinse the black currant.
Place the butterfly whisk into the mixing bowl of the Thermomix. Add the egg whites and 1 pinch salt.If you don’t own a Thermomix, use a mixer and follow the steps just like presented in this recipe. Whip the egg whites 4 MIN – SPEED 3.5. Remove the measuring cup and during this time, gradually add the sugar through the hole in the lid.If you are using a mixer, simply add the sugar while mixing the egg whites at high speed. Add the vanilla extract and the lemon juice and start to gently mix the egg whites foam for 2 MIN – SPEED 1 without the measuring cup.
During this time, gently pour the oil through the hole in the lid
Into a different bowl, mix the flour with the baking powder
Now, using a flour sifter, add the flour over the egg whites foam
Using a spatula, gently incorporate the flour in the egg whites foam
Transfer ½ of the bater into a different bowl and add the cocoa/ carob powder
Gently incorporate the cocoa/ carob powder into the batter to achieve two colors for the cake bater
Now, it is time to place the cake bater into the baking tray covered with baking paper. I recommend you to start with the white bater;
On top of it, place the black bater, which contains cocoa/ carob powder
You can use a fork or a toothpick to gently mix the two colors of the bater
Add the black currant
Bake the black currant cake into the preheated oven for 35-40 minutes, or until you pass the toothpick test.The toothpick test is extremely useful when you bake desserts. Using a toothpick, you can find out if your cake is properly bake by piercing the cake dough with it. If it comes out clean, your cake is done. If not, you should bake it some extra minutes. Leave the cake to cool for 30 minutes before serving it. If you feel the need, you can sprinkle some icing sugar in top of the cake.