Woman's Institute of Domestic Arts and Sciences, Woman's Institute Library of Cookery…
“ Even then the first attempt may not prove to be entirely successful, for often considerable experience is required before one becomes expert in the making of this delicate pastry.The best time to make puff paste is in the cold weather, as the butter, which is the fat used, can be handled more easily and rolled into the paste with greater success if it, as well as the other ingredients, are cold. If puff paste is desired in weather that is not cold, the mixture will have to be placed on ice at various intervals, for it positively must be kept as cold as possible. ”
