Cookie Butter Bars | Savory

Ingredients

• 1 (14.1 oz) jar Biscoff ® Creamy Cookie Butter, divided
• 1/2 cup plus 2 tbsp unsalted butter, softened and divided
• 1/2 cup granulated sugar
• 1/2 cup light brown sugar
• 1 large egg, at room temperature
• 1 3/4 cup self-rising flour
• 1/2 tsp salt
• 1 cup confectioners' sugar
• 1 tsp pure vanilla extract
• 3 tbsp low-fat milk
• Flaky sea salt, to garnish (optional)