Sift together in a mixing bowl: 1 1/2 c. sugar 3 tsp. baking powder 1 tsp. salt
Make a well and add: 5 unbeaten egg yolks (med. sized) 3/4 c. orange juice or 2 oranges & water
Whip 1 cup egg whites until very stiff. Do not under beat, with 1/2 teaspoon cream of tartar. Pour egg yolk mixture slowly into whipped egg whites, folding in gently until blended. Pour into ungreased 10 inch tube pan, 4 inched deep and bake 65 to 70 minutes at 325 degrees.
Melt in a saucepan 1/2 cup shortening or butter. Blend in: 1/4 c. orange juice
Boil 1 minute while stirring constantly. Add 3 cups sifted confectioners' sugar. Set saucepan in a bowl of cold water and beat until consistency to spread.