Preheat oven to 350 degrees. Line an 8x8 baking dish with nonstick foil and, then, lightly spray with nonstick cooking spray. Set aside.
Combine melted butter, brown sugar and vanilla in a mixing bowl. Whisk until smooth. {I use my mixing bowl for my mixer but whisk this step by hand.}
1 cup + 1 Tbsp salted butter, 1 cup + 1 Tbsp packed brown sugar, 2 tsp vanilla extract
In a small bowl, combine flour, baking soda and 1/2 tsp salt. Stir to combine. Working in batches, mix into butter mixture. Stir in oats.
1 1/2 cup flour, 1 1/2 cup old fashioned oats, 1 1/2 tsp baking soda, 1/2 tsp salt
Spread 1/2 of mixture into the bottom of the prepared pan. Bake in preheated oven for 10 minutes.
Meanwhile, heat caramels and heavy cream in a saucepan over medium-low heat. Stirring frequently, heat until caramels are thoroughly melted and smooth.
11 oz bag of soft caramels, 1/2 cup heavy cream
After the crust has finished baking, sprinkle it with chocolate chips. Pour caramel sauce over top of the chocolate. Sprinkle with 1 Tbsp sea salt. Crumble remaining oat mixture on top of caramel.
1 cup dark chocolate chips, 1 Tbsp sea salt
Bake for 20-25 minutes or until edges are brown and center is set. Let cool completely before serving.