I recently went to a party where they served these and immediately looked up the recipe

• Preheat oven to 350°F (175°C). Grease a 9×13-inch baking dish.
• Combine flour, powdered sugar, granulated sugar, and vanilla extract in a large bowl.
• Cut in butter until the mixture resembles coarse crumbs.
• Press half of the mixture into the bottom of the prepared baking dish. Set the remaining mixture aside.

Make the Caramel Filling:

• Combine caramel candies and heavy cream in a microwave-safe bowl.
• Microwave in 30-second intervals, stirring in between, until melted and smooth.
• Stir in sea salt and vanilla extract.

Assemble the Bars:

• Pour caramel mixture over the crust in the baking dish.
• Sprinkle the reserved crust mixture evenly over the caramel layer.

Bake and Cool:

• Bake for 25-30 minutes, or until the crust is golden brown.
• Let cool in the baking dish for 30 minutes.

Chill and Serve: