The first step to a light texture is beating the butter (together with the salt) to make it as airy as possible. Use an electric mixer, and scrape the sides often (turning off the mixer before you do so). After 5 to 7 minutes, it will be nearly twice the original volume, and have lightened from pale gold to nearly white:
Beat in the powdered sugar and vanilla. The second step to keeping them light is to add the flour gently by hand, not with the mixer. Stop just as soon as it is smooth.
These are good plain, but most Greek versions have almonds:
Toasting them deepens their flavor- just put them in the oven for about ten minutes as you are heating it up, and chop them roughly with a serrated bread knife. A teacup’s worth will be generous enough.
A difference between the Greek version and the many other international versions of this cookie is that Kourabiedes are quite large. This generous batch will yield just 20 – 24 cookies. The advantage of size (apart from the obvious)- they are less likely to dry out, and you can best appreciate the melting crumb of them when you can take a good bite.
Typical shapes are flattened ovals, and crescents:
In this batch, the ovals are plain, the crescents with toasted almond, and the balls with walnuts and cinnamon- a departure altogether (Polverones).
The third step to a light and crumbling kourabie is watchful baking. Bake at 170 C/ 350 F for about 20 minutes- they will have puffed slightly and the surfaces will be entirely dry. But they will have taken on nearly no color at all except for the bottoms, which will be gold. They will yield slightly when you press them, then firm up as they cool. If you wait until they are firm to come out of the oven, their texture will be dry rather than melting.
Have ready a large bowl of powdered sugar for rolling, and a tray where they can all fit without touching one another. Roll them generously in the sugar one by one while still hot from the oven and place them on the tray- if they touch they will stick together. The powdered sugar draws the warm butter to the surface, clings to it, and forms a layer of icing. You will see them go from white and dry to yellow and moist as the sugar absorbs the butter. Once cool, roll them again generously- the dry sugar will stick to the icing, and look like snow.