Preheat oven: to 350°F (175°C). Line a 9x13-inch pan with parchment and lightly grease.
Mix dry ingredients: In a medium bowl, whisk together flour, cocoa powder, and salt.
Mix wet ingredients: In a large bowl, whisk together melted butter and sugar until glossy. Add eggs and vanilla; beat until thick and smooth.
Combine: Stir dry ingredients into wet just until no streaks remain. Fold in chocolate chips and/or nuts if using.
Bake: Pour into pan and spread evenly. Bake 28–32 minutes, until a toothpick comes out with moist crumbs.
Cool & cut: Let cool in pan before lifting out and slicing into squares.
Notes
For extra fudgy brownies, err on the shorter end of bake time.
Want that shiny top? Whisk butter and sugar really well.
Store in airtight container up to 4 days, or freeze for longer!
Nutrition (per serving): 300 Calories, 38g Carbs, 3g Protein, 16g Fat, 80mg Cholesterol, 100mg Sodium, 140mg Potassium, 2g Fiber, 27g SugarAn automated tool is used to calculate the nutritional information. As such, I cannot guarantee the accuracy of the nutritional information provided for any recipe on this site.