Orange Sponge Cake - cooking recipe

Ingredients

1 1/3 c. flour
1 Tbsp. grated orange peel
6 eggs, separated
1 tsp. cream of tartar
1 1/2 c. sugar
1/2 c. orange juice
1/4 tsp. salt

Preparation

Combine flour and 1/3 cup sugar; set aside.
Beat egg yolks until thick and lemon colored (about 3 to 5 minutes).
Add orange peel and juice; beat until very thick.
Gradually add 2/3 cup sugar and salt, beating constantly.
Sift flour mixture over egg yolk mixture a little at a time, folding just until blended.
Wash beaters.
Beat egg whites with cream of tartar until soft peaks form.
Gradually add 1/2 cup sugar, beating until stiff peaks form.
Thoroughly fold yolk mixture into whites.
Bake in ungreased 10-inch tube pan at 325\u00b0 for about 55 minutes.
Invert cake in pan to cool.