In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Mix butter, sugar and egg thoroughly., Stir in flavoring. Sift together and stir in flour and baking powder., Chill dough. Force the dough through cookie press onto ungreased baking sheet in desired shapes., Bake until set, but not brown.
butter, sugar, egg, vanilla, flour, baking powder