Preheat oven to 350°F (175°C). Grease or line a 9x13-inch baking pan with parchment paper.
Melt butter in a large bowl. Stir in sugar until smooth. Add eggs one at a time, mixing well after each addition. Stir in vanilla.
In a separate bowl, whisk together flour, cocoa powder, and salt. Gradually mix into the wet ingredients just until combined.
Gently fold in chopped pecans and chocolate chips until evenly distributed.
Pour batter into prepared pan and spread evenly. Bake for 25–30 minutes, checking doneness with a toothpick.
Remove brownies from oven and drizzle caramel sauce over the warm brownies. Sprinkle with additional pecans if desired. Cool completely before slicing.