Ingredients
- For the Cupcakes:
- 6 tbsp unsalted butter, room temperature
- 3/4 cups sugar
- 6 tbsp sour cream, room temperature
- 2 tsp vanilla extract
- 3 large egg whites, room temperature
- 1 1/4 cups all-purpose flour
- 2 tsp baking powder
- ¼ tsp salt
- 6 tbsp milk, room temperature
- 2 tbsp water, room temperature
- For the Pastry Cream:
- 2 egg yolks
- 6 tbsp sugar
- 1 1/2 tbsp cornstarch
- 1 cup + 2 tbsp milk
- 1 tbsp salted butter
- 1 tsp vanilla extract
- For the Chocolate Ganache:
- 12 oz semi-sweet chocolate chips
- 2 tbsp light corn syrup
- 3/4 cup + 2 tbsp heavy whipping cream
Instructions
- Preheat the oven to 350°F (176°C) and prepare a cupcake pan with liners.
- Cream the butter and sugar until light and fluffy, about 3-4 minutes.
- Add the sour cream and vanilla extract, mixing well.
- Incorporate the egg whites in two batches, ensuring to mix well after each addition.
- In a separate bowl, combine the dry ingredients (flour, baking powder, salt). In a cup, mix the milk and water.
- Gradually add half of the dry ingredients to the batter, mixing well. Then add the milk mixture, followed by the remaining dry ingredients, mixing thoroughly.
- Fill the cupcake liners halfway and bake for 15-17 minutes, or until a toothpick inserted in the center comes out clean.
- For the pastry cream, beat the egg yolks in a bowl. In a saucepan, mix the sugar, cornstarch, and milk until smooth. Cook over medium heat until thickened and bubbling, then simmer for 2 minutes.
- Add a small amount of the hot milk mixture to the egg yolks, stirring constantly to temper them. Return the mixture to the saucepan and boil for another 2 minutes, stirring continuously.
- Remove from heat and stir in the butter and vanilla extract. Allow to cool to room temperature.
- For the ganache, place the chocolate chips and corn syrup in a bowl. Boil the heavy cream and pour it over the chocolate. Let sit for 3-5 minutes before whisking until smooth. Cool the ganache in the fridge until firm, about 1-2 hours.
- Once the cupcakes are cool, cut out the centers and fill with pastry cream.
- Top with chocolate ganache using a piping bag or a spoon.
Notes
Enjoy your delicious Boston Cream Pie Cupcakes!