Classic Boston Cream Pie (Printable)
Tender sponge cake layered with vanilla cream and chocolate ganache for an elegant American dessert.
# Ingredient List:
→ Sponge Cake
01 - 1 cup all-purpose flour
02 - 1 cup granulated sugar
03 - 4 large eggs, room temperature
04 - 1/4 cup whole milk
05 - 1/4 cup unsalted butter, melted and cooled
06 - 1 1/2 teaspoons baking powder
07 - 1/4 teaspoon salt
08 - 1 teaspoon vanilla extract
→ Pastry Cream
09 - 2 cups whole milk
10 - 1/2 cup granulated sugar
11 - 4 large egg yolks
12 - 1/4 cup cornstarch
13 - 2 tablespoons unsalted butter
14 - 1 teaspoon vanilla extract
15 - Pinch of salt
→ Chocolate Ganache
16 - 4 ounces semisweet or bittersweet chocolate, chopped
17 - 1/2 cup heavy cream
18 - 1 tablespoon unsalted butter
# Steps:
01 - Preheat oven to 350°F. Grease and flour two 8-inch round cake pans, or line with parchment paper.
02 - Sift together flour, baking powder, and salt in a bowl. Set aside.
03 - Beat eggs and sugar with an electric mixer until pale and thick, about 5 minutes. Mix in vanilla.
04 - Gently fold in the flour mixture until just combined.
05 - Mix milk and melted butter together, then fold into the batter until smooth.
06 - Divide batter evenly between prepared pans. Bake for 22–25 minutes, or until a toothpick comes out clean. Cool in pans for 10 minutes, then turn out onto racks to cool completely.
07 - In a saucepan, heat milk until just simmering. In a separate bowl, whisk together egg yolks, sugar, cornstarch, and salt.
08 - Slowly pour the hot milk into the yolk mixture, whisking constantly to prevent curdling.
09 - Return mixture to saucepan and cook over medium heat, whisking, until thick and bubbling, about 2–3 minutes. Remove from heat, whisk in butter and vanilla. Transfer to a bowl, cover with plastic wrap touching the surface, and chill until cold.
10 - Place chopped chocolate and butter in a bowl. Heat cream to a simmer, then pour over the chocolate. Let sit 2 minutes, then stir until smooth.
11 - Place one cake layer on a serving plate. Spread cooled pastry cream evenly over the cake. Top with the second cake layer.
12 - Pour chocolate ganache over the top, letting it drip down the sides. Chill for at least 1 hour before serving.
# Expert Tips:
01 -
- The three distinct textures of tender sponge, silky custard, and glossy chocolate create something magical in every single bite
- Making this from scratch feels like a real accomplishment but the steps are completely manageable even if you are new to layer cakes
- This is the kind of dessert that makes people pause and really savor each forkful, conversation slowing down as they enjoy it
02 -
- Pastry cream must be completely cold before you assemble the cake or it will melt and make a mess
- Room temperature eggs create significantly more volume than cold eggs so do not skip this step
- The ganache should be slightly warm when poured but not hot or it will slide right off the cake
03 -
- Place your cake pans on a baking sheet to catch any drips and ensure both layers bake at the same rate
- If your ganache is too thick add another tablespoon of warm cream and if too thin let it sit longer before pouring