1. Place 3 egg whites in the Thermomix bowl.
2. Add the whisk attachment.
3. Place the lid with the measuring cup on.
4. Mix for 3 min/speed 3.5.
5. Remove the whisk attachment.
6. Transfer to a separate container.
7. Put 90 grams of granulated sugar in the Thermomix bowl.
8. Add the 3 egg yolks to the Thermomix bowl.
9. Add the whisk attachment.
10. Place the lid with the measuring cup on.
11. Mix for 4 min/speed 3.5.
12. Add 150 grams of flour to the Thermomix bowl.
13. Add 50 grams of semi-skimmed milk to the Thermomix bowl.
14. Add 90 grams of melted butter to the Thermomix bowl.
15. Add 1 packet of vanilla sugar to the Thermomix bowl.
16. Add 1 packet of baking powder to the Thermomix bowl.
17. Place the lid with the measuring cup on.
18. Mix for 2 min 40 sec/speed 3.5.
19. Add the batter to the container with the beaten egg whites and gently mix.
20. Pour half of the batter into the Thermomix bowl.
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21. Add 75 grams of melted dark chocolate to the Thermomix bowl.
22. Place the lid with the measuring cup on.
23. Mix for 30 sec/speed 4.
24. Alternately pour the vanilla batter and the chocolate batter into a greased mold, making sure it fits in the Thermomix Varoma and that its lid closes tightly.
25. Rinse the Thermomix bowl.
26. Add 1000 grams of water to the Thermomix bowl.
27. Add the Varoma attachment.
28. Place the mold in the Varoma and place the lid on top. .
29. Cook for 50 min/120°C/speed 1.
30. Unmold once the Savane cake has cooled.