Last week a friend asked me to make a Boston Cream Cake for he and his roommate. They had looked all over town and no one knew what they were talking about...I asked, "Is it a yellow cake with a custard filling and topped with Chocolate? He said that was it. I had not had nor made one in years so I ventured through online recipes and settled on Joy of Baking's version. I made the sponge cake and pastry cream as written other than baking the cake in 2 layers rather than splitting the one layer. I also used her chocolate ganache but added an extra ounce of semi-sweet chocolate.
There are two questions that immediately come to mind when you hear Boston Cream Pie. One is "Why is it called a pie?", and the other is "Why the name 'Boston'?". To answer the first question of why "pie" instead of "cake", it is probably because colonists baked their cakes in pie tins as they did not own cake pans. As far as calling it Boston Cream Pie, the story began when a New York newspaper in 1855 published a recipe for a 'Pudding Pie Cake'. This recipe was similar to the Boston Cream Pie recipe of today except that it had a powdered sugar topping. From there we go to Boston where a man named Harvey D. Parker opened a restaurant called the Parker House Restaurant. On the menu was a 'Parker House Chocolate Pie', the recipe to which was similar to the New York newspaper recipe except a chocolate glaze had replaced the powdered sugar topping. We are not sure how it was renamed to 'Boston Cream Pie', but Bo Friberg in his book 'The Professional Pastry Chef' thinks "the name stems from the original title (in the New York paper) combined with the reference to Boston."
Read more:
http://www.joyofbaking.com/BostonCreamPie.html#ixzz1sob5kQDF
Pastry Cream:
1/4 cup (50 grams) granulated white sugar
1/8 cup (20 grams) all-purpose flour
Scant 3 tablespoons (20 grams) cornstarch (I used 6 Tablesppons cornstarch, no flour)
1 1/4 cups (300 ml) milk
Sponge Cake:
5 large eggs
3/4 cup (150 grams) granulated white sugar, divided
1/2 teaspoon pure vanilla extract
1/2 cup (60 grams) plain cake flour (not self-rising)
1/4 cup (35 grams) all purpose flour (I used 3/4 cup all purpose flour, no cake flour)
1 teaspoon baking powder
1/4 teaspoon salt
3 tablespoons milk
2 tablespoons (28 grams) unsalted butter
Chocolate Glaze:
4 ounces (120 grams) semisweet chocolate, finely chopped (I used 5 ounces)
1/2 cup (120 ml) heavy whipping cream
1 tablespoon (13 grams) unsalted butter
Pastry Cream: In a medium-sized heatproof bowl, mix the sugar and egg yolks. In another bowl, sift or whisk the flour and cornstarch together and then add to the egg mixture, mixing until you get a smooth paste.
Meanwhile in a small saucepan, bring the milk just to a boil over medium heat. Pour the milk slowly into the egg mixture, whisking constantly to prevent curdling. (Strain if necessary.) Then place the egg mixture into a medium saucepan and cook over medium heat until boiling, whisking constantly. When it boils, continue to whisk constantly for another minute or so until it becomes thick. Remove from heat and whisk in the vanilla extract. Pour into a clean bowl and immediately cover the surface with plastic wrap to prevent a crust from forming. Let the cream cool in the refrigerator for a few hours.
Sponge Cake: Preheat oven to 350 degrees F (177 degrees C) and place rack in center of oven. Butter and line the bottoms of two-8 inch (23 cm) round cake pans with parchment paper.
While the eggs are still cold separate three of the eggs, placing the yolks in one bowl and the whites in another bowl. To the yolks, add the two remaining eggs. Cover the bowls with plastic wrap and allow the eggs to come to room temperature (about 30 minutes).
Meanwhile, in a bowl whisk together the flours, baking powder, and salt. Place the milk and butter in a small saucepan, over low heat, and warm until the butter melts. Remove from heat, cover, and keep warm.
In your electric mixer, fitted with the paddle attachment, (or with a hand mixer) beat the whole eggs and yolks and 1/2 cup (100 grams) of sugar on high speed until they are thick and fluffy (3-5 minutes) (when you slowly raise the beaters the batter will fall back into the bowl in a slow ribbon). Beat in the vanilla extract.
In a clean bowl, with the whisk attachment, (or with a hand mixer) beat the egg whites at low speed until foamy. Increase the speed to medium-high and gradually add the remaining sugar, beating until soft, moist peaks form. Gently fold a little of the whites into the batter to lighten it, and then add the rest of the whites folding just until incorporated. Sift half of the flour mixture over the top of the batter and gently fold through with a rubber spatula or whisk. Sift the remaining flour over the batter and fold in.
Make a well in the center of the batter and pour the melted butter/milk mixture into the bowl. Gently but thoroughly fold the butter mixture into the batter. Divide the batter evenly between the two pans and bake for about 18 - 20 minutes or until light brown and springy to the touch. (A toothpick inserted in the middle will come out clean.) Remove from oven and place on a wire rack to cool. Immediately run a spatula around the inside of the pans and then invert the cakes onto a wire rack. Remove parchment paper and re-invert. Cool completely.
Chocolate Glaze: Place the chopped chocolate in a small heatproof bowl. Bring the cream and butter just to a boil in a saucepan over medium heat. Immediately pour the boiling cream over the chocolate and gently stir until chocolate has melted. Set aside until it has thickened to pouring consistency.
Assemble: Place one cake layer on your serving plate, bottom side facing up. Spoon the pastry cream onto the cake, spreading to make an even layer. Place the second cake layer (top side up) onto the filling. Pour the glaze onto the center of the cake and, using an offset spatula, spread the glaze to the edges of the cake, allowing the glaze to drip down the sides. Let the cake sit until the glaze sets, about one hour. This cake is best eaten the same day it is made. Cover and refrigerate any leftovers.
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