You’ll Need:Custard 1 cup granulated sugar 1/2 cup cornstarch 8 large egg yolks 3 cups whole milk 1 vanilla bean, split lengthwise 6 tablespoons (34 stick) unsalted butter, room temperature 1/4 cup dark rum Topping 3/4 cup all-purpose flour 1/2 cup almonds 6 tablespoons (packed) golden brown sugar 5 tablespoons