Chocolate Cake Filling - cooking recipe

Ingredients

1 c. milk
3 c. sugar
1 (8 oz.) block bitter chocolate
2 tsp. vanilla
2 tsp. butter
4 egg yolks

Preparation

Melt chocolate.
Beat yolks until very light and fluffy and add
sugar.
Add butter, vanilla and milk.
Cook over low flame to
full
boil,
then boil for 1 minute and remove from heat.
Add melted chocolate and beat until it holds its shape. Spread filling on layers and sides of 6 layer cake.