Jenny's Walnut Cookies | Saveur

Ingredients

• 1 1⁄2 cups flour, plus more as necessary
• 1⁄2 lb. cold unsalted butter, cut into bits
• 1⁄2 cup confectioners' sugar
• 1⁄2 cup ground walnuts
• 1⁄4 tsp. salt
• 1⁄4 cup milk
• 1⁄4 cup sugar
• 1 (1") piece vanilla bean
• 3⁄4 cup ground walnuts
• 2 tbsp. lemon juice
• 5 tbsp. plus 1 tsp. unsalted butter, softened