[From the archives. I'm not making a lot of cookies these days, but when I do these are still big favorites. They are quite plain but buttery-good, rather like shortbread but a little less rich. They are great Christmas cookies. Originally published December 2008.]
When it comes to cookies, I like them rather plain and not overly sweet. This traditional cookie from the Bretagne (Brittany) in France is so plain and simple, that the ingredients really shine. It is made of flour, sugar, egg, and the famously delicious salted butter (beurre demi-sel) of the region. Somewhat related to shortbread or sablé cookies but not as rich, for me they are almost the perfect cookie, and very more-ish.
The salted butter is the key to this cookie's distinctive nutty, buttery sweet-salty flavor. The best salted butter from the Bretagne and other regions along the Atlantic in France are creamy-fresh and rich, with little glistening crystals of salt still visible. If you can get a hold of really good salted butter, you can use traditional recipes and the cookies will turn out the way they should. If not, some adjustments need to be made. So, I would recommend following the variation of the recipe that meets your butter quality.
(You might see something called galettes bretonnes au sarrasin. These refer to a thin crêpe or pancake made out of buckwheat (sarrasin) flour, usually served with a savory filling. I love those too, but these article is about the cookie galettes bretonnes.)