Banana Cupcakes With Vanilla Pastry Cream

INGREDIENTS

• 2 3/4 cups all-purpose flour
• 1 1/4 teaspoons baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup unsalted butter, softened
• 1/4 cup vegetable shortening, at room temperature
• 1 3/4 cups sugar
• 2 teaspoons pure vanilla extract
• 2 large eggs
• 1 1/2 cups mashed very ripe bananas (about 4)
• 1/2 cup buttermilk
• 3 cups half-and-half
• 6 large egg yolks
• 1/2 cup sugar
• 3 tablespoons cornstarch
• 1/4 teaspoon salt
• 1 teaspoon pure vanilla extract