01 -
Heat oven to 350°F.
02 -
Line 8x8 metal pan with parchment.
03 -
Brown butter 10-12 minutes until nutty.
04 -
Add chocolate to butter, stir until melted.
05 -
Mix flour, cocoa, espresso powder, salt.
06 -
Whisk eggs, sugar, vanilla until fluffy.
07 -
Stream in chocolate-butter mixture.
08 -
Fold in dry ingredients gently.
09 -
Pour into pan.
10 -
Bake 28-35 minutes.
11 -
Cool completely.
12 -
Cut with hot knife into 16 squares.