Boston Cream Cupcakes

Boston Cream Cupcakes

Ingredients:

For the Cupcakes:

1 2/3 cups all-purpose flour

1 cup sugar

1/4 tsp baking soda

1 tsp baking powder

3/4 cup unsalted butter, room temperature

3 egg whites

2 tsp vanilla extract

1/2 cup sour cream

1/2 cup milk

For the Filling:

1 cup heavy cream

2 egg yolks
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