Use high-quality cocoa powder or chocolate
Add a little espresso powder
Brown the butter before mixing
Use both melted chocolate and cocoa powder
Do not overmix the batter
Slightly underbake for a fudgier texture
Add a pinch of salt
Use brown sugar for extra moisture
Replace some white sugar with dark brown sugar
Add vanilla extract
Fold in chocolate chunks or chips
Add nuts for crunch
Add a swirl of peanut butter or caramel
Sprinkle flaky sea salt on top
Chill before slicing for cleaner cuts
Let the brownies cool completely before cutting
Use parchment paper in the pan
Bake in a metal pan for even heat
Sift dry ingredients to avoid lumps
Add a little sour cream or Greek yogurt
Use room-temperature eggs
Beat eggs and sugar well for a shiny top
Add a touch of cinnamon
Mix in crushed cookies or candy pieces
Serve with ice cream or whipped cream