Break two eggs in a bowl.
Whisk it nicely.
Take chocolate and butter in a bowl.
Melt them using double boiler method placing water in another pan.
Add chocolate butter mixture to egg and mix.
Add vanilla essence and mix it nicely till it is combined
Finally add brownie mix to it.
Slowly mix without forming lumps
Grease the baking tin with butter and dust with little flour.
Pour the batter to greased tin and tap the tin to release air
Top it with some nuts
Preheat the oven to 180°C for ten minutes and bake in the same temperature for 25-30 minutes
Remove from oven and cool the brownie completely in wire rack and slice them.
Enjoy Brownie with ice cream or drizzle some chocolate and enjoy.