Chocolate Mint Striped Shortbread | Gay Lea

Ingredients

• 2 1/2 cups (625 mL) GAY LEA - Unsalted Butter, softened
• 2 cups (500 mL) instant dissolving sugar
• 5 1/4 cups (1.3 L) all purpose flour, divided
• 1 cup (250 mL) cornstarch
• 1 tsp (5 mL) salt
• 5 tsp (25 mL) peppermint extract
• 1/2 cup (125 mL) unsweetened cocoa powder
• 2 tsp (10 mL) vanilla extract
• 1/3 cup (75 mL) egg whites, well shaken (approx.)