Coffee Sponge Cake

Directions

1. 1
   Combine boiling water and coffee.
2. 2
   Add cold water to make 1 cup.
3. 3
   Sift cake flour, baking powder and salt; set aside. Separate eggs.
4. 4
   Place whites in a deep bowl and add cream of tartar.
5. 5
   Beat until stiff, but not dry.
6. 6
   Gradually add 1/2 cup sugar in beaten egg whites.
7. 7
   Continue to beat until whites stand in peaks.
8. 8
   Place yolks in large bowl and beat gradually.
9. 9
   Add 1 1/2 cups sugar and vanilla.
10. 10
    Beat until very thick.
11. 11
    Alternately with cooled coffee liquid, fold egg yolks and flour mixture, 1/4 at a time, into beaten whites.
12. 12
    Put in a 10-inch tube pan and bake at 350° for 1 hour.