Ingredients

• 2 1/2 cups graham cracker crumbs
• 1/3 cup sugar
• 1/4 cup mashed banana
• 1/4 cup (1/2 stick) unsalted butter, melted
• 1/2 cup sugar
• 1/3 cup cornstarch
• 1/4 teaspoon salt
• 1 1/2 cups whipping cream
• 1 1/2 cups whole milk
• 3 large egg yolks
• 1/2 vanilla bean, split lengthwise
• 2 tablespoons (1/4 stick) unsalted butter
• 1 teaspoon vanilla extract
• 5 ripe bananas (about 1 1/2 pounds total), peeled, cut crosswise into 1/4-inch-thick slices

Instructions

1. Preheat oven to 350°F. Stir graham cracker crumbs, sugar, and mashed banana in large bowl to blend. Add unsalted butter and stir to moisten evenly. Press onto bottom and up sides of 10-inch-diameter glass pie dish. Chill until firm, about 30 minutes.
2. Bake crust until set and pale golden, about 15 minutes. Cool completely.
3. For filling: Whisk sugar, cornstarch, and salt in heavy medium saucepan to blend. Gradually whisk in whipping cream and whole milk, then egg yolks. Scrape in seeds from vanilla bean; add vanilla bean. Whisk over medium-high heat until custard thickens and boils, about 6 minutes. Remove from heat. Whisk in unsalted butter and vanilla extract. Discard vanilla bean. Transfer custard to large bowl; cool completely, whisking occasionally, about 1 hour.
4. Whisk sugar, cornstarch, and salt in heavy medium saucepan to blend. Gradually whisk in whipping cream and whole milk, then egg yolks. Scrape in seeds from vanilla bean; add vanilla bean. Whisk over medium-high heat until custard thickens and boils, about 6 minutes. Remove from heat. Whisk in unsalted butter and vanilla extract. Discard vanilla bean. Transfer custard to large bowl; cool completely, whisking occasionally, about 1 hour.
5. Stir custard to loosen, if necessary. Spread 1 cup custard over bottom of prepared crust. Top with half of sliced bananas, then 1 cup custard, covering bananas completely. Repeat layering with remaining bananas and remaining custard. Chill banana cream pie until filling is set and crust softens slightly, at least 8 hours and up to 1 day. Cut pie into wedges and serve.