CUSTARD FOR BOSTON CREAM PIE RECIPES

Steps:

• Preheat oven to 350 degrees. In a medium mixing bowl combine flour, sugar, baking powder, and salt. Make a well in the center of the flour mixture. Add milk, oil, egg yolks, and vanilla. Beat with an electric mixer on low to medium speed until combined. Beat an additional 3 minutes on high speed and set aside.
• In a large mixing bowl, beat egg whites and cream of tartar on medium to high speed until soft peaks form. Pour the egg yolk mixture over the egg white mixture and fold in. Gently pour the batter into a 9-inch greased pie pan. Bake for 25 to 30 minutes or until the top springs back when lightly touched. Invert the pan onto a wire rack. Cool completely.
• Pastry Cream Filling: In a medium saucepan, heat the milk and vanilla bean to a boil over medium heat. Immediately turn off the heat and set aside to infuse for 10 to 15 minutes. In a bowl, whisk the egg yolks and granulated sugar until light and fluffy. Add the cornstarch and whisk vigorously until no lumps remain. Whisk in 1/4 cup of the hot milk mixture until incorporated. Whisk in the remaining hot milk mixture, reserving the empty saucepan.
• Pour the mixture through a strainer back into the saucepan. Cook over medium-high heat, whisking constantly, until thickened and slowly boiling. Remove from the heat and stir in the butter. Let cool slightly. Cover with plastic wrap, lightly pressing the plastic against the surface to prevent a skin from forming. Chill at least 2 hours or until ready to serve. (The custard can be made up to 24 hours in advance. Refrigerate until 1 hour before using.)
• Ganache: In a medium bowl, pour the boiling cream over the chopped chocolate and stir until melted.
• To assemble pie, remove the cake from the pan. Cut the cake in half horizontally. Place bottom layer on a serving plate or board, and spread with the pastry cream. Top with second cake layer. Pour chocolate ganache over and down the sides of the cake. Store in refrigerator.

Steps:

• Make the custard: In a medium saucepan, whisk together egg yolks and sugar until well combined. Whisk in cornstarch and salt. In a slow, steady stream, whisk in milk and then the cream. Add butter. Cook mixture over medium-low heat, stirring constantly with a wooden spoon, just until it starts to thicken. Immediately whisk mixture until smooth, then continue to cook and stir custard until it has come to a very low boil for 2 minutes, about 6 to 8 minutes total. Strain custard through a fine mesh sieve into a small bowl, pushing it through with a small spatula. Stir in vanilla. Cover with plastic wrap, pressing the plastic directly onto the surface. Chill for at least 3 hours and up to 24 hours.
• Prepare the cake: Heat oven to 325 degrees. Butter a 9-by-2-inch round baking pan, generously greasing the sides, and line it with parchment paper. Butter parchment paper. In a medium bowl, whisk together flour, baking powder and salt.
• In a small saucepan, bring the milk and butter to a simmer over medium heat. When the butter is melted, remove pan from heat. In a large bowl, beat eggs and sugar with an electric mixer until pale and thick, about 4 to 6 minutes. With the mixer running on low, add the milk mixture and beat until combined. Then add flour mixture and vanilla and beat until combined.
• Transfer batter to the prepared pan and smooth the top. Bake until a toothpick inserted into the center comes out clean, 30 to 35 minutes.
• Transfer to a rack and let cool 10 minutes. With a very thin knife, cut around the edge to release the cake from the side of the pan. Carefully flip the cake onto the rack, then turn it right-side-up to cool completely.
• Assemble the cake: Using a serrated knife, carefully cut the cake into two layers and place the bottom layer on a serving plate. Stir custard, and spread it onto the cut side of the bottom half. Replace the top half of the cake, cut side down.
• Prepare the glaze: In a small saucepan over medium-low, heat the cream to a simmer. Remove the pot from the heat and pour cream over the chocolate chips, oil, salt and let stand for 3 minutes. Whisk until smooth. Spread the glaze evenly over the top of the cake.