Cloud Sponge Cake - cooking recipe

Ingredients

1 1/3 c. cake flour
1/2 tsp. baking powder
1/4 tsp. salt
5 eggs at room temperature
1/2 c. ice water
1 1/2 c. fine sugar
1/4 c. orange juice and 1 Tbsp. grated orange rind
3/4 tsp. cream of tartar

Preparation

Stir together flour,
baking powder and salt; set aside. In large bowl of
mixer,
beat
egg
yolks
at high speed until thick and lemon-colored.\tGradually
beat
in
water until pale and foamy.
Gradually beat in sugar until completely dissolved, about 8 to 10 minutes.
Beat in juice and orange rind.
Fold in flour mixture in 3
additions into yolk mixture; set aside.
In small bowl of mixer,
using
clean beaters, beat egg whites and cream of tartar
until
stiff.
Gently
fold into batter.
Pour mixture into a
10-inch
ungreased tube pan.
Bake in preheated 325\u00b0 oven for about
1
hour\tor
until
cake springs back when lightly touched.
Invert pan
on neck of bottle and cool.
When completely cooled, use
thin
bladed
knife to loosen cake from pan.