Daddy's Hot Water Sponge

Yield:	1 Cake
Categories:	Cakes, Family

		Egg yolks (from Angel Food cake)
1/2	c	Water, boiling
1	tb	Vanilla extract, or more
1 1/2	c	Flour
1 1/2	c	Sugar
1	tb	Baking powder
1/2	ts	Salt
3	tb	Cocoa