Boston Cream Cupcakes

Ingredients:

For the Cupcakes:

• – 1 2/3 cups all-purpose flour
• – 1 cup granulated sugar
• – 1/4 tsp baking soda
• – 1 tsp baking powder
• – 3/4 cup unsalted butter, at room temperature
• – 3 large egg whites
• – 2 tsp pure vanilla extract
• – 1/2 cup sour cream
• – 1/2 cup whole milk

For the Filling:

• – 1 cup heavy cream
• – 2 large egg yolks
• – 3 tbsp granulated sugar
• – 1 tbsp cornstarch
• – 1 tsp pure vanilla extract

For the Chocolate Ganache: