10 Whites Cake

Directions

1. 1
   Preheat oven to 180 degrees Celsius.
2. 2
   Grease a cake pan with butter, and sprinkle with flour. Set aside.
3. 3
   Place the egg whites in a large bowl with a pinch of fine salt, and whip to stiff peaks.
4. 4
   In another bowl, place the soft butter with the sugar, and whip to a smooth cream. Add the lemon juice, lemon zest, and milk. Whisk again.
5. 5
   Add the flour and baking powder, and whisk again until completely homogeneous.
6. 6
   Add a spoonful of the stiff egg whites to this mixture, and gently mix with a spoon, from top to bottom, without beating, so that the dough loosens up.
7. 7
   Continue gently mixing in spoonfuls of stiff egg whites, until all the whites are used.
8. 8
   When the dough is fluffy and uniform, place in the cake pan, cover with sugar (optional) to give it a crunchy topping, and bake for about 35 minutes.
9. 9
   Check cooking, and unmold.