Anita Loos’ recipe for kitten’s tongue:
Take 2 eggs and not quite a cup of sugar. Whip them just a little, then add not quite a cupful of melted butter and a cup of flour. Stir the mixture, spread it on a tin in small quantities, bake them. Roll in nuts and sugar.
From Famous Recipes of Famous Women (ed. Florence Stratton, 1925).
Biblioklept 
I know this cookie, but I’ve never known it to be translated into English. I’ve always called them langue de chat.
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