Preheat the oven to 180°C (350°F).
In a food processor, combine the crème fraîche, sugar, and eggs. Whisk until smooth and well combined.
Add the almond powder and a few drops of bitter almond extract, then whisk again until fully incorporated.
Gradually add the flour and baking powder, whisking continuously to avoid lumps.
Pour in the oil and mix until the batter is smooth.
Gently fold in the diced apples, ensuring they are evenly distributed.
Pour the batter into a buttered and floured cake tin, smoothing the surface.
Sprinkle the top with flaked almonds for added crunch.
Bake for around 1 hour, keeping an eye on it as it bakes. The cake is ready when a toothpick inserted into the center comes out clean.
Let the cake cool in the tin before carefully unmolding. If you like, brush the top with a bit of apricot jam for a lovely glaze. Enjoy!