Egg Yolk Sponge Cake

Directions

1. 1
   Grease and flour 13 x 9-inch cake pan.
2. 2
   Sift together and set aside the flour, baking powder and salt.
3. 3
   Beat in mixing bowl until very thick and lemon colored the egg yolks.
4. 4
   Beat in sugar gradually.
5. 5
   Blend in slowly on low speed the boiling water and vanilla.
6. 6
   Quickly blend in dry ingredients.
7. 7
   Pour into pan.
8. 8
   Bake until top springs back at 350° for 20 to 25 minutes.