Walnuts AP flour Salt Butter softened Superfine sugar Vanilla extract Confectioners sugar
Heat oven to 325°F. Line two baking sheets with parchment paper.
Finely grind 1/2 of the nuts in a food processor to the texture of cornmeal and transfer to a medium bowl.
Coarsely chop remaining nuts in the food processor and add to the same bowl and stir in flour and salt.