Grab a 7x7-inch square baking pan and coat it with butter or a nonstick cooking spray.

Line the baking pan with parchment paper with an overhang on the sides and set it aside.

In a medium-sized mixing bowl, whisk together 1/2 cup of all-purpose flour, 1/2 cup cocoa powder, and 1/2 tsp of salt. Set aside for later use.

Add 1/2 cup of unsalted butter to a heatproof bowl over a saucepan of simmering water or in the microwave.

Let the butter cool slightly after melting (around 5 minutes), so it doesn’t cook the eggs in the batter.

Then, add 1 cup of brown sugar to the melted butter, and mix well.

Pour 1 tsp of vanilla essence into the bowl, crack in 2 large eggs one by one, and start whisking. Whisk until a smooth batter forms.

Whisk to combine all the ingredients for 1-2 minutes. You can use an electric mixer as well.

Add the flour-salt mixture you prepared earlier into the wet ingredients using a spatula.

Chop 150 grams of semi-sweet dark chocolate and mix it in.

Pour the brownie batter into the prepared baking pan.

Bake the brownies in the preheated oven at 180 degrees Celsius, 350 degrees Fahrenheit, for 25-30 minutes.

Once baked, remove the brownies from the oven and place the pan on a cooling rack.

Let the brownies cool to room temperature before lifting them out and slicing them into squares.

Enjoy the delicious brown sugar brownies on their own or serve them with a scoop of ice cream for an extra treat!