Egg Yolk Frosting - cooking recipe

Ingredients

2 egg yolks
1/8 tsp. cream of tartar
few grains salt
2 Tbsp. cold water
1 Tbsp. lemon juice
3/4 c. sugar
1/4 tsp. lemon rind (optional)

Preparation

Place egg yolks, tartar, salt, water, lemon juice and sugar in the top of a double boiler.
Place over boiling water (upper pan should not touch water).
Beat with a rotary or electric mixer for 7 minutes or until mixture is thick and fluffy and holds its shape.
Stir in lemon rind and spread on cake.
This icing especially suitable for a white cake as well as Sunshine Cake.