Chocolate Boston Cream Pie

Ingredients

• For the cake
• 8 tablespoons unsalted butter, at room temperature
• 1 3/4 cups (210g) all-purpose flour
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon salt
• 3/4 cup (170g) whole milk
• 3 eggs
• 1 cup (198g) sugar
• 1 1/2 teaspoons vanilla extract
• For the filling and ganache
• 3/4 cup (170g) whole milk
• 1 cup (227g) cream, divided
• 4 egg yolks
• 1/2 cup (100g) sugar
• 1/2 teaspoon vanilla extract
• 2 1/2 tablespoons flour
• 10 ounces dark chocolate, divided