Boston Cream Pie

Bahan-bahan (12 porsi)

• 1 cup milk
• 1 cup heavy whipping cream
• 9 tablespoons granulated sugar (divided)
• ¼ teaspoon salt
• 5 large egg yolks (room temperature)
• 3 tablespoons cornstarch
• 1 ½ teaspoons vanilla extract
• 4 tablespoons unsalted butter ( softened and cut into 4 pieces)
• ¼ cup unsalted butter (softened to room temperature)
• ¼ cup vegetable oil
• ¾ cup granulated sugar
• 2 large eggs (room temperature preferred)
• ½ tablespoon vanilla extract
• 1 ½ cups all-purpose flour
• ½ tablespoon baking powder
• ¼ teaspoon salt
• ⅔ cup buttermilk ( room temperature preferred)
• 1 cup chocolate chips
• ½ cup heavy whipping cream
• 2 tablespoons corn syrup¹