These sheet pan brownies are rich, fudgy, and made in a half sheet pan for easy slicing and sharing. Perfect for parties, bake sales, or anytime you need a big batch dessert. And, they freeze well!
Preheat to 350°F (175°C). Grease and line a half-sheet pan (18 x 13 inches) with parchment paper, leaving an overhang for easy lifting.
In a large saucepan, melt the butter. Remove from heat and stir in granulated and brown sugars until mostly dissolved. Let cool until warm.
Stir in cocoa powder until mixture is glossy and smooth.
In a separate bowl, beat the eggs and vanilla for 1 to 2 minutes until foamy. This helps create the signature shiny top.
Slowly whisk the warm chocolate mixture into the eggs, stirring constantly to avoid scrambling.
Sift in flour and salt. Gently fold until just combined. Do not overmix.
Pour the batter into the prepared pan. Smooth the top and bake for 25 to 28 minutes. The top should be shiny and a toothpick inserted in the center should come out with moist crumbs.
Let cool in the pan for 15 minutes before lifting out and slicing.