Lavender Shortbread Sandwich Cookies with Honey Buttercream – Brownie Mischief

Ingredients

• 2 cups (9 oz or 255g) all purpose flour
• 1/2 cup (2 1/4 oz or 64g) powdered sugar
• 1/2 teaspoon fine sea salt
• 1 cup (8 oz or 227g) unsalted butter, softened
• 2 teaspoons culinary lavender
• 3/4 cup (6 oz or 170g) unsalted butter, softened
• 1/2 cup (2 1/4 or 64g) powdered sugar, sifted
• 2-3 tablespoons honey
• pinch fine sea salt
• 1 tablespoon cornstarch (optional)