Ingredients
For the Cupcakes:
- 1 1/2 cups all-purpose flour
- 1 1/2 teaspoons baking powder
- 1/2 teaspoon salt
- 1/2 cup unsalted butter softened
- 1 cup granulated sugar
- 2 large eggs
- 2 teaspoons vanilla extract
- 1/2 cup milk
For the Custard Filling:
- 1 cup whole milk
- 3 large egg yolks
- 1/3 cup granulated sugar
- 2 tablespoons cornstarch
- 1 teaspoon vanilla extract
For the Chocolate Ganache:
- 1 cup semi-sweet chocolate chips
- 1/2 cup heavy cream
Instructions
Make the Cupcakes:
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Preheat the oven to 350°F (175°C) and line a muffin tin with cupcake liners.
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In a bowl, whisk together the flour, baking powder, and salt.
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In a separate bowl, cream the butter and sugar until light and fluffy. Beat in the eggs, one at a time, then stir in the vanilla.
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Gradually mix in the dry ingredients and milk, alternating between the two, starting and ending with the dry ingredients.
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Fill the cupcake liners about 2/3 full with batter and bake for 18-20 minutes or until a toothpick inserted into the center comes out clean. Cool completely.
Prepare the Custard Filling:
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In a saucepan, heat the milk until it starts to simmer. In a bowl, whisk together the egg yolks, sugar, and cornstarch until smooth.
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Gradually whisk some of the hot milk into the egg mixture to temper it, then pour the mixture back into the saucepan with the remaining milk.
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Cook over medium heat, stirring constantly, until the mixture thickens and boils. Remove from heat and stir in the vanilla.
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Transfer the custard to a bowl, cover with plastic wrap (pressing the wrap directly onto the surface of the custard to prevent a skin from forming), and chill until cool.
Make the Chocolate Ganache:
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Place the chocolate chips in a bowl. Heat the cream in a saucepan until it just begins to simmer, then pour it over the chocolate. Let it sit for a few minutes, then stir until smooth. Cool to a spreadable consistency.
Assemble the Cupcakes:
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Once the cupcakes are cool, cut a small hole in the center of each cupcake and remove a piece of the cake to make room for the filling.
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Spoon or pipe the custard filling into each cupcake.
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Spread or pipe the chocolate ganache on top of each cupcake.
Serve:
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Once assembled, the Boston Cream Cupcakes are ready to serve. You can refrigerate them until ready to enjoy, letting them come to room temperature for a few minutes before serving.