Sponge Cake

Directions

1. 1
   Beat 6 egg yolks with mixer until very thick and lemon colored, about 5 minutes.
2. 2
   Beat sugar in gradually.
3. 3
   Beat in cold water, lemon extract and grated lemon.
4. 4
   Beat in flour.
5. 5
   Beat separately 6 egg whites until frothy.
6. 6
   Add cream of tartar and salt and beat until stiff enough to form peaks.
7. 7
   Gently fold into batter with spoon.
8. 8
   Pour batter into ungreased deep 9-inch tube pan.
9. 9
   Bake at 325° for 60 to 65 minutes.
10. 10
    Invert pan immediately; let cake hang in pan until cold.