Hot Water Sponge Cake
Recipe from Possum Kingdom Lake Cookbook

1 1/2 c sifted cake flour
1 1/2 tsp baking powder
1/2 tsp salt
1 c sugar
6 Egg yolks; beaten well until thick and lemon colored
1/2 c boiling water
1 tsp lemon extract

Sift flour once, measure, add baking powder and salt, and sift together three times.
Add sugar gradually to egg yolks, mixing thoroughly. Add water, then flour and lemon extract, beating well. Bake in ungreased tube pan in slow oven (350 degrees) 45 minutes. Remove from oven and invert pan 1 hour, or until cold.