Sour Cream Frosting - cooking recipe

Ingredients

3 egg yolks
1 c. white sugar
1 c. sour cream
1 Tbsp. cornstarch
1 c. walnuts, cut up

Preparation

Beat egg yolks,
add cream, sugar, cornstarch and nuts. Cook in a
double
boiler,
stirring
constantly
until thick, before spreading on cake let frosting cool.