Millionaire Shortbread Bars • Kroll's Korner

Ingredients

• 1 cup salted butter, softened to room temperature
• 2/3 cup granulated sugar
• 1 large egg yolk, room temperature
• 1 tsp. pure vanilla extract
• 2 1/4 cups cake flour, spooned and leveled
• 1/4 tsp. kosher salt
• 1 cup salted butter
• 1, 14 oz. can sweetened condensed milk
• 1 cup light brown sugar, packed
• 1/2 cup heavy cream
• 1/4 cup golden or light corn syrup
• 1 tsp. vanilla
• 2 cups semi sweet chocolate
• flaky sea salt, for finishing