Preheat oven to 350F/180C.
Separate egg yolks from egg whites.
In a mixing bowl, whisk together egg yolks and sugar.
Then, whip in the mascarpone, until smooth.
Add flour and baking powder to your batter.
Whip the egg whites until stiff peaks. Then, using a spatula carefully fold it into your preparation.
Pour your batter into the flexipan®.
Wash and slice the white peaches in 6-8 slices each. And place them at the top of the batter.
Bake for 40 minutes at 350F/180C. (Every oven heats differently, monitor your cake from 30min)
Once your cake is out of the oven, let it cool down for about 10min. Then, Unmold, Serve and Enjoy!