Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
Cake:
1 1/4     cup           all-purpose flour
1         cup           sugar
1 1/2     tsp.          baking powder
1/2       tsp.          salt
3/4       cup           milk
1/3       cup           butter
1                       egg
2         tsp.          vanilla 

Filling:
1/3       cup           sugar 
2         tablespoons   cornstarch
1/4       tsp.          salt
1 1/2     cups          milk
2                       egg yolks, slightly beaten
2         teaspoons     vanilla

Frosting:
1/3       cup           butter
2         cup           confectioner's sugar
2         teaspoons     vanilla
2         oz            melted unsweetened chocolate
2 to 4    tablespoons   milk

Preparation:

Heat oven to 350 degrees F. Grease and flour 9-inch round cake pan. Measure all cake ingredients into a large mixer bowl. Blend 30 seconds on low speed, scraping bowl constantly. Beat 3 minutes at high speed, scraping bowl occasionally. Pour into pan. Bake 35-40 minutes. Cool. While cake is baking, prepare cream filling: Blend sugar, cornstarch and salt in medium saucepan. Combine milk and egg yolks; gradually stir in to sugar mixture. Cook over medium heat, stirring constantly until mixture thickens and boils. Boil and stir 1 minute. Remove from heat; stir in vanilla. Cool to room temperature. Once cake has cooled, split cake into 2 thin layers. Fill layer between the cakes with cream filling. Prepare frosting: Melt butter in saucepan. Blend in sugar, vanilla and melted chocolate. Stir in milk 1 Tbsp at a time until mixture becomes glaze- like. Spread over top of cake.