Glittering Lemon Sandwich Cookies

Ingredients

• 1 tablespoon fresh lemon juice
• 1 cup confectioners sugar
• White or colored sanding sugars
• 1 ¹/₃ cups all-purpose flour
• ²/₃ cup cornstarch
• ¼ teaspoon salt
• 2 sticks unsalted butter
• + 7 more ingredients
• • ½ cup confectioners sugar
  • 1 lemon
  • 1 teaspoon vanilla extract
  • ½ stick unsalted butter
  • a heavy-duty sealable bag
  • 2 tablespoons light corn syrup
  • 2 lemons

Preheat oven to 350°F with rack in middle. Line 2 large baking sheets with parchment paper. Whisk together flour, cornstarch, and salt. Beat together butter and confectioners sugar with an electric mixer until pale and fluffy, then beat in zest and vanilla. At low speed, mix in flour mixture just...

View full recipe at Epicurious