Put soft butter in a blender, add salt and flour. Whisk.
Then add the yolk and whisk again.
Grate the cheese and pour into a blender. Beat until smooth.
Wrap the finished dough with cling film and put in the refrigerator for half an hour.
Divide the dough into two parts and roll. Cut out cookies of any shape and put them on a sheet of parchment covered with parchment.
Bake crackers at 180 degrees 15 minutes.