Almond cake
Mix the first four ingredients quickly with a high-speed food processor, then add the cake flour and blend until smooth.
Whip egg whites, egg white powder and granulated sugar at a steady speed (the egg white powder stabilizes air bubbles) until stiff peaks form.
Melt the butter in a microwave and set aside, maintaining a temperature of around 50°C.
Assembly: Pour Mixture A into Mixture B for preliminary blending, then gently fold in Mixture C. Spread the batter onto a silicone baking mat and bake at 210°C for approximately 8 minutes until the surface develops a golden colour.