Almond Sablé Dough

Directions

1. 1
   In a bowl, whisk together the all-purpose flour, almond flour, and salt.
2. 2
   In the bowl of an electric mixer fitted with the paddle attachment, combine the butter and confectioners' sugar. Mix on medium-low speed until well combined, about 4 minutes.
3. 3
   Mix in the egg and then the yolk, allowing each to be incorporated before adding the next. In two additions, add the flour mixture, scraping down the sides of the bowl after each addition.
4. 4
   Turn out the dough onto a clean lightly floured work surface. Divide it in half, shape into flattened disks, and wrap each one in plastic wrap. Refrigerate for at least 1 hour, or overnight. (The dough can be frozen for up to 1 month; thaw it overnight in the refrigerator before using.)