01 - Beat softened butter and powdered sugar in large bowl until mixture becomes light and fluffy
02 - Blend in lemon juice, lemon zest, and vanilla extract until fully incorporated into butter mixture
03 - Add salt, flour, and cornstarch to mixture, stirring until soft dough forms
04 - Divide dough in half and roll each portion into 1-inch diameter logs. Wrap securely in plastic and refrigerate for minimum 30 minutes
05 - Preheat oven to 350°F and line two baking sheets with parchment paper
06 - Remove dough from plastic and slice into 1/4-inch rounds. Arrange cookies on prepared baking sheets with 1-inch spacing between pieces
07 - Place baking sheets in oven and bake for 10-12 minutes until edges turn faintly golden
08 - Let cookies rest on baking sheets for 5 minutes after removing from oven. Gently roll warm cookies in powdered sugar to coat evenly
09 - Transfer cookies to wire rack to cool completely. Apply additional dusting of powdered sugar before serving for enhanced presentation