The Best Easy Boston Cream Pie Cupcakes | Foodtalk

Ingredients

• 6 Tbsp unsalted butter, room temperature
• ¾ cup sugar
• 6 Tbsp sour cream
• 2 tsp pure vanilla extract
• 3 large eggs whites, room temperature
• 1 ¼ cups all-purpose flour
• 2 tsp baking powder
• ¼ tsp salt
• 6 Tbsp milk
• 2 Tbsp water
• 2 large egg yolks
• 6 Tbsp sugar
• 1 ½ Tbsp cornstarch
• 1 cup + 2 Tbsp milk
• 1 Tbsp butter
• 1 tsp pure vanilla extract
• 12 oz semi sweet chocolate chips
• 2 Tbsp light corn syrup
• ¾ cup + 2 Tbsp heavy whipping cream