01 -
Preheat oven following the brownie mix box instructions. Grease a 13×9 inch baking pan thoroughly.
02 -
Mix brownie batter according to the box directions and pour evenly into the prepared pan. Bake for half the time recommended on the box.
03 -
In a medium saucepan over medium-high heat, whisk together sugar, corn syrup, eggs, butter, and vanilla continuously for 15 to 20 minutes until the mixture thickens and becomes glossy, coating the back of a spoon.
04 -
Stir in the chopped pecans and cook for an additional 2 to 3 minutes until the topping reaches a runny oatmeal-like consistency.
05 -
Remove the partially baked brownies from the oven and pour the pecan filling evenly over the surface. Return the pan to the oven and bake for 25 to 30 minutes, until the center slightly jiggles when gently shaken.
06 -
Allow to cool completely at room temperature before slicing. For clean edges, slice with a warm knife. Optionally, serve warm squares topped with vanilla ice cream or whipped cream.