twice-baked shortbread + other lost recipes

INGREDIENTS

• 12 tablespoons (1 1/2 sticks) unsalted butter, melted and still warm
• 5 tablespoons granulated sugar
• 1 teaspoon pure vanilla extract or the scrapings from half a vanilla bean
• 1/4 teaspoon salt or a couple pinches of flaky maldon
• 1 1/2 cups (6.75 ounces) all-purpose flour
• Turbinado, Demerara or granulated sugar for sprinkling