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Preheat your oven to 350°F. Grease and flour four 9x13 inch baking pans, or line them with parchment paper, leaving an overhang on the sides for easy removal.

In a very large heatproof bowl set over a pot of simmering water (or using a large microwave-safe bowl), melt the unsalted butter and chopped unsweetened chocolate together, stirring occasionally until smooth. Remove from heat and let cool slightly.

Once the chocolate mixture has cooled slightly, whisk in the granulated sugar until well combined.

Add the large eggs one at a time, whisking well after each addition until fully incorporated. Stir in the vanilla extract.

In a separate large bowl, whisk together the all-purpose flour, cocoa powder, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix. If using, fold in the chocolate chips.

Divide the brownie batter evenly among the four prepared 9x13 inch baking pans, spreading it out into an even layer.

Bake for 35-40 minutes, or until a toothpick inserted into the center comes out with moist crumbs, but not wet batter. The edges should be set, and the center should still be slightly fudgy.

Remove the pans from the oven and let the brownies cool completely in the pans on a wire rack. This is crucial for fudgy brownies and easy cutting.

Once completely cooled, use the parchment paper overhang to lift the brownies out of the pans. Cut each pan of brownies into 20 squares (5 rows by 4 rows) for a total of 80 servings.


Preheat your oven to 350°F. Grease and flour four 9x13 inch baking pans, or line them with parchment paper, leaving an overhang on the sides for easy removal.

In a very large heatproof bowl set over a pot of simmering water (or using a large microwave-safe bowl), melt the unsalted butter and chopped unsweetened chocolate together, stirring occasionally until smooth. Remove from heat and let cool slightly.

Once the chocolate mixture has cooled slightly, whisk in the granulated sugar until well combined.

Add the large eggs one at a time, whisking well after each addition until fully incorporated. Stir in the vanilla extract.

In a separate large bowl, whisk together the all-purpose flour, cocoa powder, and salt.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to overmix. If using, fold in the chocolate chips.

Divide the brownie batter evenly among the four prepared 9x13 inch baking pans, spreading it out into an even layer.

Bake for 35-40 minutes, or until a toothpick inserted into the center comes out with moist crumbs, but not wet batter. The edges should be set, and the center should still be slightly fudgy.

Remove the pans from the oven and let the brownies cool completely in the pans on a wire rack. This is crucial for fudgy brownies and easy cutting.

Once completely cooled, use the parchment paper overhang to lift the brownies out of the pans. Cut each pan of brownies into 20 squares (5 rows by 4 rows) for a total of 80 servings.
