Preheat oven to 350°F and line a baking sheet with parchment paper.
In a large bowl, combine the brownie mix, flour, eggs, oil and water; batter will be thick.
Using a small cookie scoop, drop the dough onto parchment-lined baking sheet, keeping 2 inches between the cookies.
Bake for 8 minutes, or until the top of the cookie has a dry appearance, but is still soft to the touch. Don't overbake!!
Let cool for 2 minutes, then use a small cap (such as a cap of a vanilla bottle) to make an indentation in the center of each cookie.
In a microwave-safe bowl, combine the caramel bits, heavy whipping cream and salt. Microwave for 1-2 minutes, stirring every 30 seconds, until smooth.
Spoon into the center of each cookie.
In another small bowl, combine the chocolate chips and oil. Microwave for 60-90 seconds, stirring every 30 seconds, until smooth.
Drizzle the chocolate over the cookies and sprinkle with flake sea salt.
Notes
Store these cookies in an air-tight container in the fridge for up to 5 days. I recommend placing a sheet of waxed paper between layers of cookies so they don't stick together due to the soft filling.