Esse Cookies

Directions

1. 1
   Place the butter and sugar in a food processor and whizz to combine into a soft paste. Add the flour, egg yolks, vanilla extract, lemon zest and salt. Add 1 to 2 tablespoons of milk gradually, adding the full amount (or more) if the mixture is too dry to be pliant.
2. 2
   Place the mixture on a floured work surface and bring together. Wrap it up in clingfilm and place in the fridge for 1 hour.
3. 3
   Preheat the oven to 170° C. Cut off pieces of the chilled dough and roll into cylinders, 15 centimeters long and 2 centimeters in diameter. Bend into S-shapes and put onto a baking tray lined with parchment. Bake in the preheated oven for 10 to 15 minutes, or until only just golden.
4. 4
   Cool on a wire rack and store in an airtight container. They will keep for a good few days.