Ukrainian coffee torte

1 cup strong coffee
1 cup sifted cake flour
1 tsp baking powder
5 eggs, separated
1 cup sugar
2 grains salt
Filling:
1 cup butter, softened
1 cup brown sugar
1/2 cup strong coffee
2 egg yolks
Toasted slivered almonds

1. Prepare the coffee (2 tablespoons coffee to 1 cup water) and cool it. Reserve 1/2 cup of the coffee for the filling. Sift the flour with the baking powder and salt twice. Beat the egg whites until stiff. Add 1/2 cup of the sugar gradually and beat constantly until thick. Beat the egg yolks until light. Add the other 1/2 cup sugar gradually and continue beating until light and fluffy. Combine both mixtures and fold to blend thoroughly. Add the flour alternately with 1/2 cup of the cooled coffee.
2. Spoon the batter into an ungreased, deep, round baking pan. Bake in a moderate oven (350 F) for about 45 minutes, or until done when tested. Invert on a cake rack and cool. Cut the cake into 2 layers.
3. Filling: Cream the butter with the sugar until very light. Add the coffee gradually and beat with a rotary beater until fluffy. Beat in the egg yolks. The filling should be of a spreading consistency. Spread the between the layers, over the top and on the sides. Decorate with the toasted almonds. Place the torte in a cool place for several hours before cutting.