Description
This classic Boston Cream Cake features a moist vanilla sponge cake layered with a rich, creamy custard filling and topped with a luscious chocolate ganache. Perfect for dessert lovers, this recipe creates a beautiful and indulgent treat that’s sure to impress at any gathering.
Ingredients
Scale
For the Cake:
- 2 ½ cups all-purpose flour
- 2 ½ tsp baking powder
- ½ tsp salt
- ¾ cup unsalted butter, softened
- 1 ¾ cups granulated sugar
- 4 large eggs, at room temperature
- 1 ¼ cups whole milk
- 1 tbsp vanilla extract
For the Custard Filling:
- 2 cups whole milk
- 4 large egg yolks
- ½ cup granulated sugar
- 3 tbsp cornstarch
- 2 tsp vanilla extract
For the Chocolate Ganache:
- 8 oz semi-sweet chocolate, chopped
- 1 cup heavy cream
Instructions
- Prepare the Cake: Preheat your oven to 350°F (175°C). Grease and line two 9-inch round cake pans with parchment paper to ensure easy removal after baking. In a bowl, whisk together the all-purpose flour, baking powder, and salt, then set aside. In a separate large bowl, cream the softened unsalted butter and granulated sugar together until the mixture is light and fluffy, which creates a tender crumb in the cake. Add the eggs one at a time, beating well after each addition to incorporate air. Stir in the vanilla extract. Gradually add the dry ingredients alternately with the whole milk, beginning and ending with the dry ingredients, to maintain a smooth batter without overmixing. Divide the batter evenly between the two prepared pans and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean, indicating that the cakes are fully baked. Let the cakes cool completely on a wire rack before assembling to prevent the custard from melting.
- Make the Custard Filling: In a medium saucepan, heat 2 cups of whole milk over medium heat until it begins to steam but does not boil, which helps avoid curdling when combined with eggs. In a separate bowl, whisk together the 4 large egg yolks, ½ cup granulated sugar, and 3 tablespoons cornstarch until smooth, ensuring there are no lumps in the custard. Slowly pour the hot steamed milk into the egg mixture while whisking constantly to temper the eggs, preventing them from scrambling. Return the combined mixture to the saucepan and cook over low heat, stirring constantly until the custard thickens to a pudding-like consistency, indicating it is ready. Remove from heat, stir in the 2 teaspoons vanilla extract for flavor, then transfer to a bowl and cover the custard surface directly with plastic wrap to prevent a skin from forming. Chill the custard for at least 1 hour in the refrigerator until fully set.
- Prepare the Chocolate Ganache: Heat 1 cup heavy cream in a saucepan over medium heat until it just begins to simmer, being careful not to boil it. Pour the hot cream over the chopped 8 oz semi-sweet chocolate placed in a heatproof bowl, and let it sit for 1 minute. After resting, stir the mixture gently until it becomes smooth, shiny, and fully combined. Allow the ganache to cool to a thick but spreadable consistency suitable for topping the cake.
- Assemble the Cake: Place one cooled cake layer onto a serving plate or cake stand. Spread the chilled custard filling evenly over the top of this first layer using a spatula, ensuring a smooth, even layer for a balanced bite. Carefully place the second cake layer over the custard. Pour the cooled chocolate ganache over the top layer, spreading it evenly and allowing some ganache to drip down the sides for a classic, elegant look. Chill the fully assembled cake in the refrigerator for at least 30 minutes to allow the ganache to set firmly before serving.
Notes
- Make sure all your eggs and dairy ingredients are at room temperature to achieve a smooth batter and custard.
- When mixing the batter, avoid overmixing to keep the cake tender and light.
- Use high-quality chocolate for the ganache for the best flavor and texture.
- Chill the custard thoroughly to ensure it sets properly and doesn’t run when assembling the cake.
- The cake can be stored in the refrigerator for up to 3 days; bring to room temperature before serving for best taste.
