Choux pastry filling recipe is Bavarian cream one of my top secret recipes. Bavarian cream recipe 5 egg yolks 2/3 cup sugar 1/4 cup cornstarch 1 3/4 cup milk 2 teaspoons vanilla or 1 vanilla bean 1 cup heavy whipping cream Mix together yolks, sugar and cornstarch in a medium bowl. Set this aside. In a pot on medium heat heat the milk until it simmers. Then slowly pour the milk into the egg mixture, once it’s mixed then transfer it back into the pot on medium heat add the vanilla. Mix constantly