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Classic Homemade Boston Cream Pie Recipe

A square slice of boston cream pie featuring yellow cake, thick vanilla custard filling, and dripping chocolate ganache topping.
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Create the iconic Boston Cream Pie from scratch. This recipe guides you through making a tender vanilla sponge cake, a rich pastry cream filling, and a glossy chocolate ganache topping for a bakery-style dessert.

Ingredients

Scale
  • For the Vanilla Sponge Cake:
  • 1 3/4 cups all-purpose flour
  • 1 1/2 cups granulated sugar
  • 1 tablespoon baking powder
  • 1/2 teaspoon salt
  • 1/2 cup unsalted butter, softened
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup whole milk
  • For the Vanilla Custard Filling (Pastry Cream):
  • 1/2 cup granulated sugar
  • 1/4 cup cornstarch
  • 1/4 teaspoon salt
  • 2 cups whole milk
  • 4 large egg yolks
  • 2 tablespoons unsalted butter
  • 1 teaspoon vanilla extract
  • For the Chocolate Ganache Topping:
  • 4 ounces bittersweet chocolate, finely chopped
  • 1/2 cup heavy cream
  • 1 tablespoon light corn syrup (optional, for shine)

Instructions

  1. Prepare the Cake Layers: Preheat your oven to 350°F (175°C). Grease and flour two 8-inch round cake pans.
  2. In a large bowl, whisk together the flour, sugar, baking powder, and salt.
  3. Add the softened butter, eggs, and vanilla extract to the dry ingredients. Beat with an electric mixer on medium speed for two minutes.
  4. Gradually pour in the milk while mixing on low speed until just combined. Do not overmix.
  5. Divide the batter evenly between the prepared pans. Bake for 25 to 30 minutes, or until a toothpick inserted into the center comes out clean.
  6. Let the cakes cool in the pans for 10 minutes before inverting them onto a wire rack to cool completely.
  7. Make the Vanilla Custard Filling: In a medium saucepan, whisk together the sugar, cornstarch, and salt.
  8. Whisk in the milk until smooth. Cook over medium heat, stirring constantly, until the mixture thickens significantly and begins to bubble. Continue to cook and stir for one minute after it thickens.
  9. In a separate bowl, whisk the egg yolks lightly. Temper the yolks by slowly whisking about 1/2 cup of the hot milk mixture into the yolks.
  10. Pour the tempered yolk mixture back into the saucepan with the remaining hot milk mixture. Cook over medium heat, stirring constantly, until the custard thickens again and comes to a boil. Boil for one minute.
  11. Remove the custard from the heat. Stir in the butter and vanilla extract until smooth.
  12. Press plastic wrap directly onto the surface of the custard to prevent a skin from forming. Chill in the refrigerator for at least 2 hours, or until completely cold and firm.
  13. Assemble the Boston Cream Pie: Once the cakes are cool and the custard is chilled, place one cake layer on your serving plate.
  14. Spread the chilled vanilla custard filling evenly over the first cake layer.
  15. Top with the second cake layer.
  16. Make the Chocolate Ganache Topping: Place the chopped chocolate in a heatproof bowl.
  17. Heat the heavy cream in a small saucepan until it just begins to simmer around the edges. Do not let it boil rapidly.
  18. Pour the hot cream over the chopped chocolate. Let it sit undisturbed for 5 minutes.
  19. Whisk gently until the chocolate is completely melted and the mixture is smooth. Stir in the corn syrup, if using. Let the ganache cool slightly until it is pourable but not runny.
  20. Pour the chocolate ganache over the top center of the assembled cake, allowing it to drip naturally down the sides.
  21. Chill the Boston Cream Pie for at least 30 minutes before slicing and serving.

Notes

  • For a perfectly flat cake layer, you can level the domes with a serrated knife after cooling.
  • If you prefer a quicker filling, you can substitute the homemade custard with 3 cups of good quality vanilla instant pudding mix prepared according to package directions.
  • This dessert is best served the day it is made, but leftovers store well covered in the refrigerator for up to 3 days.

Nutrition

Find it online: https://cookingzenith.com/boston-cream-pie-recipe-classic-cake/