Preheat the oven to 350℉.
Make the brownie batter according to the directions on the package. Place the batter in the baking pan and bake for 20 minutes.
While baking, mix together the corn syrup, sugar, butter, eggs, vanilla extract and lastly the pecans.
Once the brownies are almost finished at the 20 minute mark, remove the pan from the oven and carefully add the pecan pie topping to the brownies. Please be careful because if you pour at full force in the center that's still slightly under baked you'll have a mess.
Place the pan back in the oven for a remaining 20 minutes.
Once the time is up, remove the brownies from the oven and allow to cool a bit before serving. You can serve them warm but caution with the pecan topping, it'll be hot.