Steep the banana in milk:

Slice the bananas into ½-inch cross sections. Run a paring knife down the center of the vanilla bean. Split it open with your fingers and use the knife to scrape out the tiny black seeds into a heavy-bottomed medium saucepan. Add the vanilla pod, half the sugar, milk, and bananas to the saucepan and bring the mixture to a simmer over medium heat. Remove from the heat, cover, and allow the bananas and the vanilla to steep 10 minutes.

In a mixing bowl, combine the egg yolks, egg, and remaining sugar, malt syrup if you’re using it, and salt and briskly whisk for 2 minutes. Add the flour and the cornstarch, whisking briskly and continuously until the mixture is smooth and no signs of the flour remain.

Using a ladle, slowly whisk some of the hot liquid into the egg mixture to warm it. Gradually pour the warmed egg mixture into the hot milk mixture, whisking constantly as you pour.

Cook the custard:

Cook the custard over medium heat, whisking vigorously and making sure to scrape the bottom of the pan every 10 strokes of the whisk. The custard will thicken significantly. Once bubbles rise to the top of the custard, cook for 30 seconds longer and remove from the heat. Pass the custard through a line-mesh strainer into a stainless-steel bowl. Rinse and dry the vanilla bean and save it for another use. Allow the custard to cool for 5 minutes, stirring occasionally to allow the heat to escape. Whisk in the butter, transfer to the refrigerator, and chill for 30 minutes.

Lighten the custard with cream:

In a chilled stainless-steel bowl, whip the cream until it holds soft peaks. Scrape the whipped cream into the bowl with the banana custard. Fold the two mixtures together: place the spatula in the center of the bowl, scrape the bottom, and bring the bottom over the top. Rotate the bowl 45 degrees and continue folding until the cream is fully incorporated.

At this point you can portion this banana cream into parfait glasses or bowls or you can chill it in a quart container.

Serving Suggestions:

Serve this banana cream with crunchy toffee sprinkled on top. You can also use this as a cream topping for the Chocolate Bête Noire or the Chocolate Caramel Tart.

Variation:

Banana Cream Pie: Make the Chocolate Crumb Crust and fill the baked crust with the banana cream. Top off the pie with 1½ cups of whipped cream and a sprinkling of Almond Toffee.