First beat eggs n sugar

Now add oil in dark chocolate and melt it.

Now seive dry ingredients.n gradually add it in eggs and sugar batter.fold with spectula don't use beater

Now add melted oil n chocolate in this mixture and gently fold.dont use beater.

Now pour all the mixture in greased square pan of,8*8.tap the pan

Now bake it in preheated oven for 30 minutes.