We wanted a rich and creamy custard that wasn't too sweet, so we could fully enjoy the signature crunchy layer of caramelized sugar on top. By only using egg yolks, we achieved a soft and creamy texture. We tried using milk and half-and-half but, in the end, we landed with heavy cream for its richness. Whole vanilla beans give a more intense, pure vanilla flavor that you can't get from extract. We also like seeing the vanilla seeds flecked throughout the custard.