I am using the 1-2-3 recipe for shortbread and the dough is coming out so sticky it's hard to pat it into a pan. I had been using Lurpak salted butter and things went well. Changed butters to an American brand and the sticky started. Changed back to Lurpak unsalted and the dough is really sticky, too. Chilling doesn't seem to help, the cookies spread out to a thin layer, but they do taste good even if they are a bit greasy. Anyone have any thoughts on this problem? I do live in a humid climate and take the butter right out of the refrigerator before mixing.