CHOCOLATE LAYER CAKE WITH CHOCOLATE GLAZE

Steps:

• For filling: Bring milk to simmer in heavy medium saucepan.
• Remove from heat.
• Combine sugar and cornstarch in large bowl.
• Beat egg yolks into sugar mixture.
• Gradually whisk hot milk into yolk mixture.
• Return mixture to saucepan.
• Whisk over medium heat until mixture boils and thickens, about 1 minute.
• Remove from heat; add chocolate, butter and vanilla and whisk until mixture is smooth.
• Transfer filling to medium bowl.
• Cool, stirring occasionally.
• Gently press plastic wrap directly onto surface of filling; cover and chill until cold, at least 3 hours.
• For cake: Preheat oven to 325°F.
• Butter 17 1/4 x 11 1/2 x 1-inch jelly roll pan.
• Line pan with parchment paper.
• Sift first 6 ingredients into large bowl.
• Whisk coffee, buttermilk, oil, eggs and vanilla in medium bowl.
• Add liquid ingredients to dry ingredients; mix just until combined.
• Transfer batter to prepared pan, spreading evenly.
• Bake cake until tester inserted into center comes out clean, about 20 minutes.
• Cool cake completely in pan on rack.
• Using small knife, cut around edges of pan.
• Turn cake out onto work surface.
• Peel off parchment.
• Trim tough edges.
• Cut cake crosswise into three 5x10 1/2-inch pieces.
• (Filling and cake can be made ahead. Keep filling refrigerated up to 2 days. Wrap cake layers in plastic and refrigerate up to 1 day.) Place 1 cake layer on platter.
• Spread half of filling over top.
• Top with second cake layer.
• Spread remaining filling over.
• Top with third cake layer.
• Pour lukewarm glaze over top and sides of cake, covering completely.
• Smooth sides with spatula.
• Refrigerate 2 hours.
• (Can be prepared 1 day ahead; cover and keep refrigerated.).
• Chocolate Glaze (Makes 3 cups): Bring cream to simmer in large saucepan over low heat.
• Add chocolate, whisk until smooth.
• Remove from heat.
• Stir in corn syrup.
• Cool glaze until barely lukewarm.