Preheat oven to 350 °F. Line a 9x13-inch baking pan with parchment paper, leaving some overhang for easy removal.
Make the brownies: In a large saucepan, melt the butter and chopped chocolate over medium-low heat, stirring until smooth. Remove from heat and whisk in both sugars. Add eggs and vanilla, whisking until combined. Sift in flour, cocoa powder, and salt, then fold gently until no streaks remain. Spread batter evenly into the prepared pan.
Bake the brownie base for 25–30 minutes, or until the edges are set but the center is still slightly soft. Remove from oven and set aside.
Prepare the pecan pie topping: In a medium bowl, whisk together brown sugar, corn syrup, eggs, melted butter, vanilla, and salt until smooth. Stir in pecans.
Pour the topping evenly over the partially baked brownies. Return to the oven and bake for 15–20 minutes more, until the topping is set and golden.
Cool completely in the pan on a wire rack, then refrigerate for 30 minutes before slicing into squares.
Notes
Room Temperature: Store in an airtight container for up to 2 days. They’ll stay soft and fudgy.In the Refrigerator: Keep them in a covered container for up to 1 week. The fridge actually helps them stay extra fudgy! Let them sit at room temperature for 10 minutes before eating if you want them less cold.In the Freezer: Wrap individual squares in plastic wrap, then put them all in a freezer bag. They’ll stay fresh for up to 3 months. Thaw in the fridge overnight or at room temperature for a couple hours.Pro Tip: Cut them into squares before storing so you can grab just one (or two!) whenever you want.
This recipe was calculated using the exact brands and measurements I used to make this recipe. If you are following a strict diet please note changing anything will cause the nutritional info to change. My calculations are intended as a guide only.