Begin by preheating your oven to 325 degrees.
Prepare your 13"x9" pan by lining it with parchment paper, ensuring a smooth baking process and easy brownie removal.
In a medium saucepan, combine all pecan pie filling ingredients, excluding the pecans and vanilla. Stir continuously and bring the mixture to a boil.
1/4 cup sugar, 1/4 cup brown sugar, 2 tbsp cornstarch, 3/4 cup light corn syrup, 4 tbsp unsalted sweet cream butter, 1/2 tsp kosher salt, 2 large eggs
Once boiling, remove from heat. Stir in the pecans and vanilla, ensuring an even distribution. Pour the mix into a bowl, let it cool on the counter for about 10 minutes, then refrigerate for 1 hour. This cooling process will help the topping set just right.
1 1/2 cup Chopped Pecans, 1 tsp pure vanilla extract
As your topping chills, focus on the brownie base. In a large bowl, using a hand mixer, blend the brownie ingredients until you achieve a consistent batter.
2 boxes of Betty Crocker Triple Chocolate Fudge brownie mix, 1/4 cup of water, 1 cup of canola oil, 4 large eggs
Pour your batter into the prepared pan, spreading it evenly.
Bake for 44-47 minutes, ensuring that the brownie is fully baked yet retains its moist, fudgy center.
Once baked, allow the brownie to cool until it's comfortable to touch. Transfer the brownie slab to a cookie sheet.
Remove your pecan pie topping from the fridge. Evenly spread it over the brownie base.
Cut the brownies into squares.
Serve and enjoy!