Step 1: Preheat your oven to 350°F (175°C). Line an 8x8 inch baking pan with parchment paper, leaving an overhang on two sides to easily lift the brownies out later.
Step 2: In a large, heatproof bowl, melt the unsalted butter. You can do this in the microwave in 30-second intervals or over a double boiler. Once melted, remove from heat.
Step 3: Add the granulated sugar to the melted butter. Whisk vigorously for 1-2 minutes until the mixture is glossy and well combined. This is key for that signature crackly top.
Step 4: Whisk in the eggs, one at a time, ensuring each egg is fully incorporated before adding the next. Stir in the vanilla extract. Continue whisking for another 1-2 minutes until the mixture is lightened in color and slightly thickened.
Step 5: In a separate medium bowl, whisk together the all-purpose flour, unsweetened cocoa powder, and salt, ensuring there are no lumps.
Step 6: Gradually add the dry ingredients to the wet ingredients, folding gently with a spatula until just combined. Be careful not to overmix. If using, fold in the chocolate chips.
Step 7: Pour the batter evenly into your prepared baking pan and spread it out smoothly with a spatula.
Step 8: Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with moist crumbs, but not wet batter. The edges should look set. Do not overbake to maintain fudginess.
Step 9: Let the brownies cool completely in the pan on a wire rack before lifting them out using the parchment paper overhang. Slice into 16 even squares and serve. Enjoy your Easy Homemade Brazilian Brownie Recipe!