Step 2: Line an 8×8-inch (20×20 cm) baking dish with parchment paper.
Step 3: In a large mixing bowl, combine the melted butter, granulated sugar, and light brown sugar. Whisk until well combined. Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.
Step 4: In a separate bowl, sift together the cocoa powder, flour, espresso powder, and salt.
Step 5: Gradually add the dry ingredients to the wet ingredients and stir gently with a spatula until just combined.
Step 6: Pour the brownie batter into the prepared baking dish and spread it out evenly.
Step 7: Bake the brownies for about 20-25 minutes until set on the edges but still gooey in the center.
Step 8: Let the brownies cool in the dish for about 10 minutes, then lift them out using the parchment paper and cool completely on a wire rack before slicing.
Notes
Use room temperature eggs for smoother mixing. Don’t overmix the batter to keep brownies fudgy. Check for doneness with a toothpick.