Preheat oven to 350?F (180?C). Line 15- x 10-inch (40 x 25 cm) rimmed baking sheet with parchment paper.
Prepare brownie mix according to package directions. Scrape into prepared pan; smooth top.
Bake for 10 to 12 minutes or until only a few moist crumbs stick to cake tester when inserted into centre. Let cool completely. Remove parchment paper.
Cut into three 10- x 5-inch (25 x 12 cm) rectangles; set aside.
Meanwhile, using electric mixer, beat together cream cheese and 1/2 cup (125 mL) caramel sauce until smooth. Using clean beaters and bowl, beat cream until stiff peaks form. Fold into cream cheese mixture.
Place 1 brownie cake layer on serving platter. Spread with one-third of cream cheese mixture.
Repeat layers twice. Refrigerate for at least 1 hour or up to 24 hours.
Before serving, drizzle with remaining caramel and sprinkle with pecans and sea salt.