Walnut Layered Cake

Description
In Romanian: Tort de nuci

Ingredients

 * 10 egg whites
 * 2 cups confectioner's sugar
 * 2 cups ground walnuts
 * butter
 * icing

Filling I

 * 14 oz / 400 g butter
 * 3 yolks
 * 1 - 2 tablespoons cocoa or chocolate
 * 1 cup confectioner's sugar

Filling II

 * 14 oz / 400 g butter
 * 3 yolks
 * 1 teaspoon vanilla or grated peel from 1 lemon or ¼ cup rum
 * 3 tablespoons sour cream
 * 1 cup confectioner's sugar

Directions

 * 1) Whip the 10 egg whites, then add the sugar, beating continuously.
 * 2) When the Sugar has melted, add the ground walnuts and fold in gently.
 * 3) Pour some of the resulting mixture into the baking pan that was covered with buttered paper.
 * 4) The layer must be about 1 finger thick.
 * 5) The number of sheets depends on the size of the pan.
 * 6) After baking each sheet individually, let cool.
 * 7) Then spread with the desired cream (chocolate, butter, etc.) and arrange one on top of the other. Glaze with the desired icing.
 * 8) The most appropriate fillings for this cake are the following.

Filling I

 * 1) Cream butter, adding yolks one by one, cocoa or grated chocolate and confectioner's sugar.

Filling II

 * 1) Cream butter with confectioner's sugar and then add yolks one by one, vanilla or grated lemon peel (or ¼ cup rum, or vanilla) and sour cream.
 * 2) Mix everything well until creamy.