Courtesy of Elm Hill Cookies
Great with a cup of hot Earl Grey tea!
PREHEAT oven to 375F. In mixer bowl, beat butter with icing sugar, salt and vanilla until a smooth mixture forms. Add flour slowly and mix just until dough comes together. Add pistachios and mix them gently with a wooden spoon or hands into dough until incorporated.
FORM dough into a log using parchment paper to mold into shape. Wrap log in plastic wrap and freeze until solid. If log has been in freezer for longer than a couple of hours, let it sit at room temperature to soften slightly before slicing.
SLICE the log into ¼ inch slices and place on a parchment lined baking tray. Place in a preheated oven and bake for 3 -5 minutes. Turn baking tray around and bake another 3-5 minutes until edges are slightly browned.
COOL cookies for a few minutes on the baking sheet and then transfer to a rack and cool completely.