01 -
Preheat oven to 175°C. Line a 23x33-centimetre baking pan with parchment paper, leaving overhang for easy removal.
02 -
In a large saucepan over medium-low heat, melt butter with chopped semi-sweet chocolate, stirring frequently until smooth. Remove from heat.
03 -
Whisk granulated sugar and brown sugar into the warm chocolate mixture until fully combined.
04 -
Add eggs one at a time, whisking thoroughly after each addition, then blend in vanilla extract.
05 -
In a separate bowl, whisk together flour, cocoa powder, and salt. Gently fold dry ingredients into wet mixture just until combined.
06 -
Spread the brownie batter evenly in the prepared pan, smoothing the top. Bake for 25–30 minutes until the edges are set; the centre may appear slightly soft.
07 -
While brownies bake, whisk together brown sugar, corn syrup, eggs, melted butter, vanilla extract, and salt in a bowl until smooth. Stir in chopped pecans.
08 -
Pour pecan mixture evenly over partially baked brownie layer.
09 -
Return pan to oven and bake an additional 15–20 minutes, until topping is golden and set.
10 -
Allow to cool completely in the pan on a wire rack. Refrigerate for 30 minutes before slicing into squares.