Daffodil Cake - cooking recipe

Ingredients

1 1/4 c. cake flour or all-purpose flour
1 3/4 c. sugar
1 3/4 c. egg whites (12 to 13 eggs)
1 1/2 tsp. cream of tartar
1/4 tsp. salt
1 1/2 tsp. vanilla
5 egg yolks
2 Tbsp. cake flour or all-purpose flour
2 Tbsp. sugar
1 Tbsp. grated lemon peel

Preparation

Sift flour and 3/4 cup sugar three times.
Reserve.
Beat egg whites, cream of tartar and salt in large bowl until soft peaks form, 2 minutes.
Gradually beat in 1 cup sugar to form stiff peaks, 3 to 4 minutes.
Gently fold 1/2 cup flour mixture into whites.
Repeat with remaining flour mixture, 1/2 cup at a time. Add vanilla.
Remove 1/3 batter to medium-size bowl.
Beat yolks, 2 tablespoons flour and 2 tablespoons sugar in bowl until pale yellow and ribbony, for about 2 to 3 minutes.
Stir in peel.
Fold yolk mixture into reserved egg white batter mixture.