Method
1. Pre-heat oven - 175°C
2. Prepare 2 clean round pans
3. Add salted butter, granulated sugar and orange zest to a clean large mixing bowl
4. Cream until light and fluffy
5. Add egg yolk to the butter-sugar mixture one by one while mixing
6. Add all purpose flour, baking powder and ground almonds to a clean medium bowl
7. Mix briefly until combined
8. Fold dry ingredients into batter gently
9. Add orange juice to the batter
10. Mix until combined
11. Add egg whites to a clean large mixing bowl
12. Whisk until stiff
13. Fold egg whites into batter gradually until completely mixed
14. Transfer batter to 2 round pans
15. Bake until skewer tests clean - 30 min, 175°C
16. Transfer onto cooling rack
17. Add white chocolate to a clean small glass bowl
18. Melt in microwave - low heat
19. Add crème fraîche to a clean medium bowl
20. Whip until thick
21. Fold chocolate into cream until combined
22. Add marmalade to a clean small bowl
23. Assemble the cake
24. Decorate with blueberries
25. Chill in fridge - approx 1 hr