Grapefruit Cake - cooking recipe

Ingredients

4 egg yolks
3/4 c. sugar
1/2 c. strained grapefruit juice
pinch of salt
1 tsp. baking soda
1 c. sifted flour
1 tsp. baking powder
1/8 tsp. salt
4 stiffly beaten egg whites
1/4 c. sugar

Preparation

Beat egg yolks until light; add sugar and continue beating until smooth.
Stir in grapefruit juice and baking soda.
Sift together flour, baking powder and salt.
Add to egg yolk mixture.