Execution
Follow the master commands
For the sandwich cookie cream the soft butter for about a minute, then add the sugar and cream for another two minutes. Incorporate the egg fully before mixing in the egg yolk. Once everything is nicely combined, add all remaining ingredients and mix one more time. Form dough into a ball and wrap in plastic wrap. Chill for at least half an hour or overnight.
Preheat oven to 180 degrees Celsius and line two baking sheets with parchment paper.




