Sift the powdered ingredients. Preheat the oven to 170. Line the cake pan with parchment paper.
Put the eggs and sugar in a bowl and heat in a 50 double boiler. Once it becomes warm to the touch, remove from the double boiler and beat (until it reaches the stage where you can draw an S on the surface).
Beat until it becomes thick and white, sift the drt ingredients again, and fold into the batter in 2-3 portions.
Warm the butter and milk in the microwave and quickly mix it all together (the butter will melt at about 40-50).
Pour the batter into the cake pan and lightly drop the cake pan on a table to release the air. Bake in an oven at 70 for 30-35 minutes.
Once baked, remove from the cake pan and peel off the parchment paper. Let cool on a rack.
Adjust the temperature and time to your oven. Keep an eye on it as it bakes.
Step 2: Beat until the batter forms ribbons when lifted. Step 6: If a skewer or toothpick pushed into the center comes out clean, it's done baking.