Twix Cookie Bars

Ingredients

• 2 sticks salted butter (softened)
• 1 cup granulated sugar (7.5 ounces)
• 1/2 cup light corn syrup
• 2 cups all-purpose flour (10 ounces)
• 1 teaspoon pure vanilla extract
• 1 tablespoon salted butter
• 1/8 teaspoon salt
• 1 cup heavy whipping cream (divided)
• 1 teaspoon pure vanilla extract (for caramel)
• 1 1/4 cups milk or dark chocolate (8 ounces)
• 1 cup powdered sugar (4.5 ounces)
• 1/3 to 1/2 cup heavy whipping cream (for chocolate)