In a bowl, mix melted butter and brown sugar. Add vanilla extract. Next, add eggs one at a time (a total of 3). Once the eggs are mixed in, sift in the flour and cocoa powder.

Into the well-mixed batter, stir in chocolate chunks (you can use dark chocolate, Kinder chocolate, white chocolate, or even add nuts like walnuts, hazelnuts, or pecans if desired).

Pour the batter into a baking tray and bake in a preheated oven at 180°C (356°F) for 30 minutes.

The brownies can be served warm with ice cream or whipped cream.

Enjoy your meal!