Sunshine Sponge Cake - cooking recipe

Ingredients

1 2/3 cups cake flour
1 teaspoon baking powder
1/2 teaspoon salt
1 cup sugar
10 egg yolks (at room temperature)
3/4 cup hot water
1 teaspoon lemon extract

Preparation

Sift together cake flour, baking powder and salt. Set aside.
With electric mixer, beat egg yolks until slightly thickened; add hot water gradually, beating until mixture is very thick and light (about 10 minutes).
Add flavoring to egg yolks, then add sugar gradually, beating constantly.
Fold in flour, about a fourth at a time (I do this by hand) folding until well blended.
Pour batter into an ungreased 10-inch tube pan.
Bake at 375\u00b0F for 40-50 minutes until done.
Remove cake from oven and invert pan.
Let cake stand for an hour until cool.