Chop up chocolate into small pieces and cube a stick of butter. 3 oz unsweetened baking chocolate bar, 114 grams unsalted butter
Place butter and chocolate in a medium sized microwavable bowl and microwave in 30 seconds intervals. Stir and return to the microwave for another 30 seconds until melted. I find 1 minute and 15 seconds is just right for me.
Add in the sugars, eggs, vanilla and sourdough discard. Mix until combined.150 grams granulated sugar, 165 grams brown sugar, 4 grams vanilla extract, 2 large eggs, 75 grams sourdough discard
Add in the salt and flour and mix until just combined. Does not have to be completely smooth.4 grams salt, 140 grams all-purpose flour
Fold in chocolate chips.84 grams chocolate chips
Line a 9x9 metal baking pan with parchment paper or spray lightly with non-stick spray. Pour the brownie batter in the pan and spread it evenly.
Bake for about 27 minutes until set and toothpick comes out with just a light streaking and a few crumbs.
Sprinkle powdered sugar on top and enjoy!
Notes
Do not overbake or these brownies will become dry.
Overmixing will make these brownies more cake-like. Mix until just combined.