Rich, fudgy brown butter brownies with a shiny, crackly top and deep chocolate flavor. Browning the butter adds a subtle nutty richness that makes these classic brownies even more irresistible.
Preheat oven to 350°F (175°C). Line an 8-inch square pan with parchment paper.
Place the butter in a small saucepan and melt over medium heat. Cook, stirring frequently, until the butter is golden brown, smells nutty, and has browned bits in the bottom of the pan.
Remove from the heat, transfer to a large bowl, and let cool 10 minutes.
Stir both sugars into the warm butter. Then whisk in the eggs and egg yolk until thick and glossy, about 1-2 minutes.
That extra mixing helps create the shiny, crackly top and rich, fudgy texture that make these brownies so good.
Mix in the vanilla.
Add the flour, cocoa, and salt. Mix just until combined.
Stir in the chocolate chips if using.
Bake 28 to 35 minutes, or until a pick inserted near the center comes out with a few moist crumbs. The brownies will continue to set as they cool.
Let cool completely before cutting into bars.
Notes
Natural unsweetened cocoa powder is recommended for the best flavor and texture.
Brownies continue to set as they cool, so avoid over-baking.
Store in an airtight container at room temperature up to 3 days.