Preheat the oven to 350. Line an 8x8 or 7x11-inch glass baking dish with foil and spray with non-stick cooking spray.
Combine the melted butter, brown sugar and vanilla in small sauce pan.
In a mixing bowl, combine the flour, oats and baking soda. Mix the butter mixture in with the dry ingredients and form a loose batter. Press half of the batter into the base of the prepared baking dish. Bake for 10 minutes.
Let cool for a few minutes, then top with the chocolate chips and caramel 'bits.' (If your store doesn't have the 'bits' you can cut caramel pieces into 4 small squares.) Sprinkle about 1 1/2 tsp sea salt in with the chocolate and caramel bits.
Take the remaining 'batter' and crumble it up and drop it on top of the chocolate and caramels. Sprinkle the remaining sea salt over the batter.
Bake for another 8-10 minutes, or until top begins to golden. Let cool for about 10 minutes before slicing and enjoying the gooey-goodness from the cookie bars.