How to Make Egg Yolk Cookies

• Cut unsalted butter into small pieces. 
• In the bowl, mix all-purpose flour and unsalted butter. 
• Add sifted powdered sugar, egg yolks, orange zest, a pinch of salt, and vanilla bean paste. 
• Mix with the paddle attachment until well incorporated. 
• Separate dough into 2-3 parts. 
• Each part of the dough is shaped into a log (salami-looking) and covered with granulated sugar. Wrap tightly into plastic wrap. Twist ends of plastic wrap and chill in the refrigerator for 2-3 hours (or overnight). 
• Slice each log into 1/3-inch pieces and put into the freezer for 15 min. 
• Preheat oven to 350^oF.
• Bake at 350^oF for 16-18 minutes. 
• Cool cookies on the baking mat for 10-15 minutes, then move them to the cooling rock.