Prepare the ingredients: Preheat the oven to 350°F. Grease a 9-by-9-inch baking pan.

Make the brownies: In a medium bowl, combine the flour, sugar and cocoa powder. In another small bowl, whisk together the butter and eggs. Add the egg mixture into the flour mixture, stirring until just combined.

Bake the brownies for 25 to 35 minutes, or until a toothpick inserted in the center comes out clean. Remove from the oven and let cool for 5 minutes. Cut into 16 squares and serve.