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["Prepare cake layers; heat oven to 350 degrees.", "Grease and flour two 9"" round cake pans.", "In large bowl with electric mixer at medium speed, beat 1/4 cup butter, 1 cup sugar, eggs, 2/3 cup milk, 1 tsp vanilla, baking powder, and flour about 4 minutes until thoroughly blended and smooth.", "Spoon batter into prepared pans; bake 30 minutes until wooden pick inserted in center of each layer comes out clean.", "Remove layers to wire racks to cool completely.", "Prepare egg custard: In 2 qt saucepan, stir 2/3 cup sugar, cornstarch and salt until thoroughly mixed; slowly stir in 2 1/2 cups milk until smooth.", "Bring to boil over medium heat, stirring constantly; cook 1 minute until mixture boils rapidly and thickens.", "Remove from heat; very slowly pour lightly beaten egg yolks into hot mixture, stirring rapidly and constantly to blend and keep smooth.", "Return mixture to low heat; cook 1 minute longer.", "Do not allow to boil.", "Remove from heat; stir in 1 tbsp vanilla.", "Cool completely, stirring frequently.", "Prepare chocolate glaze: In small heavy saucepan over very low heat, melt chocolate and 1 tbsp butter, stirring frequently until blended and smooth.", "Remove from heat; stir in confectioners sugar and 1/4 cup milk until blended and smooth.", "Keep warm, covered.", "To assemble: Using sharp serrated knife, carefully cut cooled layers in half horizontally.", "Place one layer, cut side up, on serving platter; spread with 1/3 cooled custard.", "Repeat with remaining cake layers and custard, ending with cake layer, cut side down.", "Spoon warm glaze over top of cake,letting mixture drip down sides."]